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Monte Carlo Investigation of Dielectric Characteristics in Silicene–Germanene Nanosystem with Junction Connection SPIN (IF 1.8) Pub Date : 2024-03-07 Z. Fadil, Rajesh Haldhar, Chaitany Jayprakash Raorane, R. El Fdil, S. Karam, Munirah D. Albaqami, P. Rosaiah, Seong Cheol Kim
In this study, Monte Carlo investigation delves into the dielectric features of silicene–germanene nanosystem with junction connection. We emphasized the profound influence of physical parameters, coupling between Si–Si and Ge–Ge atoms and temperature, on these dielectric features. Our results highlight the pivotal role of the coupling parameter between Ge atoms in influencing blocking temperatures
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Deposition Pressure Dependence on Spin Hall Angle of W Thin Films Grown on NiFe SPIN (IF 1.8) Pub Date : 2024-02-15 K. Sriram, Yaswanth Sai Pappu, M. S. Devapriya, Jhantu Pradhan, Arabinda Haldar, Chandrasekhar Murapaka
Spin-to-charge conversion and vice versa due to spin-orbit coupling in ferromagnet-heavy metal heterostructure is of paramount interest for developing energy-efficient spintronic devices. Here, we have systematically investigated the effect of Ar deposition pressure (PAr) on the tungsten (W) crystalline phase and extracted spin-dependent transport parameters. X-ray diffraction results show that 10nm-thick
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Two-Dimensional van der Waals Materials and Heterostructures for Spin-Orbit Torque Applications SPIN (IF 1.8) Pub Date : 2024-02-08 Towhidur Rahaman, Abhishek Kumar, Soumya Jyoti Ray, Debangsu Roy
Spin-orbit torque (SOT) plays an efficient and versatile role in electrical manipulation in spintronic devices at the nanoscale, which shows great promise for ultrafast and energy-efficient magnetic random-access memory (MRAM). To get high-performance SOT devices, their charge-to-spin conversion ratio must be sufficiently high and low current consumption is the desired one. Two-dimensional van der
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Spin–Orbit Torque and Geometrical Backscattering SPIN (IF 1.8) Pub Date : 2024-02-08 Seng Ghee Tan, Che-Chun Huang, Mansoor B. A. Jalil, Ching-Ray Chang, Szu-Cheng Cheng
We show in this paper that the technologically relevant field-like spin–orbit torque (SOT) shows resilience against the geometrical effect of electron backscattering. As a device grows smaller in size, the effect of geometry on physical properties like spin torque, and hence switching current could place a physical limit on the continued shrinkage of such a device — a necessary trend of all memory
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A Micromagnetic Study of the Influences of DMI on Spin-Cherenkov Effect SPIN (IF 1.8) Pub Date : 2024-02-08 Mingming Yang, Ming Yan
The Spin-Cherenkov effect (SCE) refers to the Cherenkov-type excitation of spin waves (SWs). The Dzyaloshinskii–Moriya interaction (DMI) can cause chiral-symmetry breaking of the magnetization dynamics in magnetic systems, resulting in asymmetric dispersion relations and relevant effects. Here, we report a correlated phenomenon for Cherenkov SW excitations in a transversely magnetized nanostrip. In the presence of
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On the Design of Power Attack Immune Spintronic Associative Memory SPIN (IF 1.8) Pub Date : 2023-12-29 Milad Ghazanfari, Abdolah Amirany, Mohammad Hossein Moaiyeri, Kian Jafari
The growing utilization of neural networks has led to a heightened focus on the hardware implementation of such networks. Security concerns associated with these implementations pose a significant challenge in this regard. Among these problems, the vulnerability of these networks against side-channel attacks such as power attacks can be mentioned. This paper presents a technique to enhance the resilience
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Phase Diagrams of a Mixed-Spin-1/2 and Spin-5/2 Hexagonal Nanotube with Core–Shell Structure SPIN (IF 1.8) Pub Date : 2023-12-12 R. Aharrouch, Y. Al Qahoom, K. El Kihel, M. Madani, M. El Bouziani
A ferrimagnetic hexagonal Ising nanotube with spin-1/2 core and spin-5/2 shell is investigated using the mean field approximation (MFA) and the Monte Carlo simulation (MCS). More exactly, we have examined the effects of the exchange interactions and crystal field on the magnetic properties of the system. Our phase diagrams show the appearance of critical and compensation behaviors, as well as first-order
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Pulsed Hot Dense Oxygen Plasma Irradiation of Platinum for Improved Spin Hall Effect SPIN (IF 1.8) Pub Date : 2023-11-24 Sachin Kumar, Sourabh Manna, John Rex Mohan, Utkarsh Shashank, Joseph Vimal Vas, Mayank Mishra, Surbhi Gupta, Hironori Asada, Yasuhiro Fukuma, Rajdeep Singh Rawat, Rohit Medwal
The impurity incorporation in host high spin-orbit coupling materials like platinum (Pt) has shown improved charge-to-spin conversion efficiency by modifying the up-spin and down-spin electrons trajectories via bending or skewing them in opposite directions. This enables efficient generation, manipulation, and transport of spin currents. In this study, we irradiated the Pt thin films with pulsed hot
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Energy Spectrum of the Strongly Coupled Superconducting Artificial Atoms SPIN (IF 1.8) Pub Date : 2023-11-23 Raveendharan Sundaram, Wei-Chen Chien, Yu-Han Chang, Chien-Yi Wu, Cen-Shawn Wu, Watson Kuo
We experimentally investigated the energy spectrum of two strongly coupled tunable transmon atoms with a coupling energy of 300MHz. The energy levels are dispersively probed through a readout resonator coupled to the atoms. The higher excited level energies could be probed by 2-photon or 3-photon processes. The power dependence of the readout transmission showed that the n-photon process satisfies
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Structural, Optical, Relaxor and Transport Properties of a Nanocrystalline Double Perovskite: Ba2(FeMo)O6 SPIN (IF 1.8) Pub Date : 2023-11-22 S. Mishra, R. N. P. Choudhary, S. K. Parida
The paper presents a synthesis (solid-state. reaction) and characterization of a lead-free double perovskite oxide Ba2(FeMo)O6 ceramic. The initial analysis using X-ray diffraction revealed that the material has a cubic crystal symmetry with a micro-lattice strain of 0.000824 and an average crystallite size of 62nm. The microstructural features and elemental composition of the prepared polycrystalline
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Modulations for Quantum Electronic Material Transports by Vacuum Annealing Methods SPIN (IF 1.8) Pub Date : 2023-11-03 Ji-Wei Ci, Bo-Yu Chen, Yuan-Chih Hung, Huan-Chien Wang, Dung-Sheng Tsai, Wu-Yih Uen, Yuan-Liang Zhong, Jyh-Shyang Wang, Chi-Te Liang, Chiashain Chuang
Gapless linear band structure quantum electronic materials play important roles in quantum computing developments due to their novel superb electronic transport properties and two-dimensional (2D) gateable device possibility. However, the sensitive surface of quantum electronic materials easily reacted with ambient air molecules so as to change their intrinsic transport properties. We review a series
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Effect of Defects on the Characteristics of CoFeB–MgO-Based MRAM Structure SPIN (IF 1.8) Pub Date : 2023-10-31 Bosen Zhang, Jieyao Chen, Junlin Wang, Wenjia Li, Kaiyu Tong, Guanqi Li, Jun Ma, Jing Wu, Yongbing Xu
Magnetic random-access memory (MRAM) is one of the most promising next-generation purpose memory devices for nonvolatile storage and in-memory computing. However, material defects can affect the performance of the MRAM device. Here, the relationship between the material defects and the properties of CoFeB–MgO-based MRAM have been studied with micromagnetic simulations. The results show that the coercivity
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Superconducting Quantum Circuits Based on 2D Materials SPIN (IF 1.8) Pub Date : 2023-10-11 Cheng-Han Lo, Yung-Hsiang Chen, Avishma J. Lasrado, Thomas Kuo, You-Yi Chang, Tao-Yi Hsu, Yen-Chih Chen, Guo-Ping Guo, Kuei-Lin Chiu
Transmon-type superconducting qubits have become a popular platform for quantum computing due to their robust qubit coherence properties. In recent years, different types of materials have been searched to replace the Al2O3 tunnel barrier in conventional Al-based Josephson junctions, in order to explore new functions of qubits utilizing the distinct nature of the chosen materials. In this report, we
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Spin Pumping in Moderately Perpendicular W/CoFeB/HfOx Thin Films SPIN (IF 1.8) Pub Date : 2023-10-11 Shiva Gaur, Nilamani Behera, Johan Åkerman, Anubhav Raghav
Large perpendicular magnetic anisotropy (PMA) and spin-orbit torques are two essential requirements for high-density and energy-efficient spintronic devices. Recent advances in magneto-electric and magneto-ionic control of PMA and spin-orbit torques have opened a pathway to explore different oxide materials with large dielectric constant and high ion mobility. Motivated by interesting memristive properties
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Thermodynamic Properties and Magnetocaloric Effect of Spins - 1/2 Square Lattice SPIN (IF 1.8) Pub Date : 2023-10-07 M. Choubi, S. Harir, A. El Ghazrani, A. Lahbibi, M. Sougrati, Y. Boughaleb
This work aims to investigate the thermodynamic properties and magnetocaloric effect (MCE) of spins - 1/2 square lattice using Monte Carlo simulation. The considered Ising model is parameterized by the couplings J, aJ and bJ; where J is the ferromagnetic exchange interaction between first nearest-neighbor spins, a is the anisotropic parameter and bJ is the ferromagnetic exchange interaction between
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Magnetic and Thermal Hysteresis in Monolayer Anthracene-Type Nanostructures SPIN (IF 1.8) Pub Date : 2023-10-07 Aftab Aslam Parwaz Khan, Z. Fadil, Pankaj Raizada, Pardeep Singh, Maha Alotaibi, Mohammad Omaish Ansari, Anish Khan, Abdullah M. Asiri, Chaitany Jayprakash Raorane
A monolayer anthracene-like nanostructure was investigated through Monte Carlo simulations to determine its compensation temperature and magnetic hysteresis cycle. Also, the effects of exchange coupling on compensation and transition temperatures were discussed. Additionally, the magnetic hysteresis cycles and magnetic coercive field as well as the surface of multi-loop hysteresis were studied with
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Study of the Mixed Spin Ising Nanowire with Random and Dilute Crystal Field SPIN (IF 1.8) Pub Date : 2023-09-26 M. Mouhib, S. Bri, M. D. Belrhiti, H. Mounir
The mixed spin Ising nanowire with random and dilute crystal fields has been explored based on the finite cluster approximation. Much concern has been addressed in treating the effects of the randomness with two distribution types of the crystal field on the phase diagrams. It has been demonstrated that for a low random crystal field D marked by the fluctuation d, all transition lines are of second
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Tailoring Spin-to-Charge Conversion Efficiency via Microwave Frequency in La0.67Sr0.33MnO3/Pt Bilayer System SPIN (IF 1.8) Pub Date : 2023-09-25 Pushpendra Gupta, Braj Bhusan Singh, Abhisek Mishra, Aditya Kumar, Anirban Sarkar, Markus Waschk, Subhankar Bedanta
The generation of spin current in materials with high spin–orbit coupling is one of the primary topics for future spintronic applications. In this context, the high conversion efficiency of spin current to charge current is desired. Ferromagnetic resonance (FMR)-based inverse spin Hall effect (ISHE) is a quite popular method to study such spin-to-charge conversion. Here microwave frequency plays a
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Monte Carlo Study on the Magnetic Properties of the Silicene–Germanene Junction-Like Nanostructure SPIN (IF 1.8) Pub Date : 2023-09-13 H. Eraki, N. Saber, Z. Fadil, A. Mhirech, B. Kabouchi, L. Bahmad
In this work, we study the ground state phase diagrams and the magnetic properties of the mixed spins (S=3∕2, G=5∕2) of the silicene–germanene junction-like nanostructure. In the first step, the ground state phase diagrams have been established to show the more stable configurations corresponding in different physical parameter planes. Besides, we have used the Monte Carlo simulations in order to study
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Implementation of Quantum Image Encryption via Reversible Quantum Logic Gates Computing SPIN (IF 1.8) Pub Date : 2023-08-31 Yi Lin Cheng, Yu Ping Liao, Chih Yu Chen, Tsung Wei Huang
With the development of quantum communication technology, Shor’s algorithm is expected to crack RSA encryption. Quantum communication will change the method of classical encryption in the future. We propose a quantum image encryption method via reversible quantum logic gates computing as quantum computing is reversible. An entangled pair of qubits are used for data transmission. The plaintext image
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Nonequilibrium Study of the J1−J2 Ising Model with Random J2 Couplings in the Square Lattice SPIN (IF 1.8) Pub Date : 2023-08-31 Octavio D. Rodriguez Salmon, Minos A. Neto, Thiago Lobo, Francisco Dinóla Neto
We studied the phase transitions of the J1−J2 spin-1/2 Ising model in the square lattice by considering J1 fixed and J2 as random interactions following discrete and continuous probability distribution functions. The configuration of J2 in the lattice evolves in time through a competing kinetics using the Metropolis algorithm leading to a steady state without reaching the free-energy minimum. So, different
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Physics-Inspired Optimization in the QUBO Framework: Key Concepts and Approaches SPIN (IF 1.8) Pub Date : 2023-08-30 Lien-Po Yu, Chin-Fu Nien
Quantum computing promises to have a tremendous advantage over its classical counterpart for solving computationally hard problems, yet remains in a relatively early stage for practical applications owing to the limited capabilities of today’s quantum computers. The approach to the special purposes of quantum computers by exploiting the special-purpose physics-inspired or quantum-inspired computers
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Quantum-Inspired Vehicle Routing Scheme for Rebalancing in Bike Sharing Systems SPIN (IF 1.8) Pub Date : 2023-08-30 Chia-Ho Ou, Chih-Yu Chen, Chu-Fu Wang, Ching-Ray Chang
Bike sharing systems (BSSs) are gaining popularity worldwide, and with the rise of global warming, they have become even more critical for reducing greenhouse gas emissions in cities. One of the key operations of a BSS is rebalancing, which involves maintaining the number of bikes at each station to a target value by arranging vehicle loading and unloading operations. This paper proposes a quantum-inspired
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Magnetization Switching in Atom-Thick Mo Engineered Exchange Bias-Based SOT-MRAM SPIN (IF 1.8) Pub Date : 2023-08-30 Dongyan Zhao, Yanning Chen, Zanhong Chen, Cheng Pan, Jin Shao, Ao Du, Wenlong Cai, Kaihua Cao, Zhen Fu, Kewen Shi
The manipulation and detection of antiferromagnetic (AFM) in exchange bias (EB)-based MRAM using spin-orbit torque (SOT) holds promise for developing highly reliable and ultrafast spintronic memory devices. However, the high switching current induced by the SOT-induced EB field remains a major drawback. Additionally, the mechanism behind the interaction between the EB field and the SOT remains unclear
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An Energy and Quality Efficient MTJ/FinFET Approximate 5:2 Compressor for Image Processing Applications SPIN (IF 1.8) Pub Date : 2023-08-22 Behrang Hadian Siahkal-Mahalle, Jalil Mazloum
Shrinking the transistor dimensions in complementary metal-oxide-semiconductor (CMOS) technology has led to many huge problems, like high power density. Various methods at different design levels of abstraction, such as approximate computing and spintronic devices based on magnetic tunnel junction (MTJ), have been studied to solve these problems. In this paper, we propose a novel hybrid MTJ/FinFET-based
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Rotational Symmetry Breaking Enhanced Frequency Comb of NiFe Vortex in a Square Disk SPIN (IF 1.8) Pub Date : 2023-08-22 Shizhu Qiao
This work explores the frequency comb of magnetic vortex in a square disk and a circular disk created by an out-of-plane and in-plane oscillating field using micromagnetic modeling. The broadest frequency comb ever observed in a magnetic system is displayed. When driven by an out-of-plane field, the robustness of the frequency comb of a vortex in a square disk is significantly enhanced due to a reduction
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The XZ Model in the Mean-Field Approximation with Exponential Pauli Spin Matrices SPIN (IF 1.8) Pub Date : 2023-08-22 Erhan Albayrak
In this study, the mean-field approximation (MFA) is applied to the study of the XZ model for spin-1/2 in terms of Pauli spin matrices and their exponentials to obtain the magnetization components for the ferromagnetic (FM) and antiferromagnetic (AFM) cases. The details of obtaining the series expansion for the exponential Pauli spin matrices by using their fundamental properties and commutativity
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Investigation of Structural, Magnetic, and Elastic Properties of a New Full-Heusler Alloy Ir2FeAl SPIN (IF 1.8) Pub Date : 2023-08-22 Moued Mebrek, Baghdad Medjahed, Mostefa Zemouli, Benabdellah Benyamina, Mohamed Berber, Djillali Benziadi, Samir Amrani
In this paper, we studied the magnetic stability, structural, elastic and electronic properties of Ir2FeAl full Heusler compound in the regular phase (Cu2MnAl, prototype L21), by using the first principle of density functional theory, with the generalized approximation of the GGA gradient. We found that the ferromagnetic state of Ir2FeAl is more stable than the nonmagnetic configuration at their lattice
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Intelligent Hybrid Trading Strategies Based on Quantum-Inspired Algorithm SPIN (IF 1.8) Pub Date : 2023-08-15 Shu-Yu Kuo, Yu-Chi Jiang, Yao-Hsin Chou
Investing in stocks is a common choice for financial management. Technical indicators (TIs) assist investors in determining the best trading time to make a fortune. Moving average (MA) and relative strength index (RSI) are the most common TIs. The proposed hybrid technique maximizes the capabilities of these two indicators. This study utilizes the quantum-inspired algorithm to assist effectively in
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Prolonging the Qubits Entanglement via Local Surface Plasmon Modes SPIN (IF 1.8) Pub Date : 2023-08-15 Chia-Yi Ju, Wan-Yu Liu, Shuo-Yen Chen, Guang-Yin Chen
A key to achieving quantum computing is the qubit-entanglement. Nevertheless, real-life qubits cannot be isolated from the environment completely. As a result, the entanglement between qubits decoheres via their interaction with the environment. Therefore, it is essential to understand how the qubit-entanglement changes over time. In this work, we study the entanglement between qubits when placed in
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Low Power and Fully Nonvolatile Full-Adder Based on STT-SHE-MRAM SPIN (IF 1.8) Pub Date : 2023-08-07 Morteza Adelkhani, Mahdi Aminian
Currently, static circuit power is becoming a major concern, dominating the total power consumption due to the scaling down of CMOS technology. The smaller sizes drastically affect the leakage current, which integrated circuit designers attempt to overcome this issue. Hence, several methods and technologies have been proposed to prevail this phenomenon. One of these methods is using memory structures
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A Theoretical Analysis of Spin-Dependent Tunneling in ZnO-Based Heterostructures SPIN (IF 1.8) Pub Date : 2023-07-27 L. Bruno Chandrasekar, M. Karunakaran
The electron tunneling in ZnO/ZnCdO semiconductor heterostructure is studied using the matrix method. The spin-polarization is examined due to Dresselhaus spin–orbit interaction and Rashba spin–orbit interaction. The total spin-polarization is mainly due to Dresselhaus spin–orbit interaction and the Rashba spin–orbit interaction is small. The high degree of spin polarization can be achieved at a high
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The Prospects of Quantum Secure Direct Communication: An Overview SPIN (IF 1.8) Pub Date : 2023-07-25 Yao-Hsin Chou, Kuo-Chun Tseng, Shu-Yu Kuo
Quantum-secure communication and computation have garnered increasing attention due to their powerful search capabilities for certain complex problems and their ability to provide unconditional security. This indicates that classical cryptography, such as asymmetric ciphers based on complex mathematics, faces a significant threat from quantum algorithms. However, quantum cryptography can detect any
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Network Bandwidth Utilization Optimization with Quantum-Inspired Approach SPIN (IF 1.8) Pub Date : 2023-07-25 Tsung-Hsuan Tsai, YiChing Chen, Chin-Fu Nien
As the popularity of mobile devices and services continues to increase, the demand for more efficient and effective algorithms to manage network utility is increased. Here, we aim to optimize Network Bandwidth Utilization (NBU) by managing user equipments (UEs) and base stations (BSs) association in 5G ORAN architecture. We consider the network total throughput as an objective function and try to find
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Dielectric Properties of a Phenanthrene-Like Nanoisland B14A10: Monte Carlo Study SPIN (IF 1.8) Pub Date : 2023-07-21 Z. Fadil, Chaitany Jayprakash Raorane, R.-El Fdil, Seong Cheol Kim
The dielectric properties of a monolayer phenanthrene-like nanoisland of formula B14A10 are examined in this research using Monte Carlo simulations. We evaluate the behaviors of the electric hysteresis loops and blocking temperature under the exchange coupling, crystalline field and temperature effects. The multi-loop hysteresis behavior examined in this research may have beneficial applications in
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Comparative Study of Spin Pumping in Epitaxial- and Polycrystalline-NiO/Ni80Fe20 SPIN (IF 1.8) Pub Date : 2023-06-30 Kacho Imtiyaz Ali Khan, Pankhuri Gupta, Rekha Agarwal, Niru Chowdhury, Pranaba Kishor Muduli
We perform a comparative study of spin pumping in NiO/Ni80Fe20 (Py) by altering the crystallinity of NiO. We simultaneously grow high-quality NiO/Py heterostructures on Si/SiO2 and Al2O3(0001) substrates. Although the growth on Si/SiO2 substrate produced polycrystalline NiO (Poly-NiO), the growth on Al2O3(0001) substrate produced epitaxial NiO (Epi-NiO). Our ferromagnetic resonance measurements reveal
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Towards Nonvolatile Spintronic Quaternary Flip-Flop and Register Design SPIN (IF 1.8) Pub Date : 2023-06-19 Motahareh BahmanAbadi, Abdolah Amirany, Mohammad Hossein Moaiyeri, Kian Jafari
The exciting properties of multi-valued logic (MVL) in overcoming the limitations of binary systems have led to widespread research on this topic. Considering various types of MVL, quaternary logic is more compatible with the existing binary systems. This paper proposes a nonvolatile quaternary flip-flop (NQFF) based on the unique features of the carbon nanotube field-effect transistors (CNTFETs) and
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Investigating the Impact of Temperature on Magnetic-Field Behavior of Thin-Film Three-Layer Systems Co/Cu/Co and Co/Gd/Co SPIN (IF 1.8) Pub Date : 2023-06-08 A. V. Makarov, E. E. Shalygina
This paper presents the results of investigating the impact of temperature on the magnetic properties of Co/Gd/Co and Co/Cu/Co thin-film three-layer systems obtained via ion-plasma magnetron sputtering. The following features of the studied samples were found. In particular, when the temperature changes from 100 to 300K, the coercive force of studied systems decreases. The magnetic moment of Co/Cu/Co
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Critical and Compensation Behaviors of a Ferrimagnetic Multilayer System SPIN (IF 1.8) Pub Date : 2023-06-07 Y. Al Qahoom, R. Aharrouch, K. El Kihel, M. Madani, N. Hachem, M. El Bouziani
By the use of Monte Carlo simulation, we have investigated the phase diagrams and magnetic properties of a ferrimagnetic Ising multilayer system with mixed spins (1, 1∕2). The ground-state phase diagrams are first constructed for T=0K. To examine the influences of certain physical parameters of the system, namely the exchange interactions, the number of layers and the crystal field, we have studied
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Structural and Magnetic Properties of Ni Nanoparticles Embedded in Vinyl Polymer Nanocomposite Films SPIN (IF 1.8) Pub Date : 2023-06-07 Swati Nagar, G. S. Mukherjee, M. Banerjee
Ni nanoparticles layer of nominal thickness in the range of 5–40nm were deposited on polyvinyl alcohol (PVA) film by using the ion beam sputtering (IBS) technique. PVA films were made on a quartz substrate by the solution casting technique. Grazing incidence X-ray diffraction (GIXRD) results reveal Ni is present in a metallic form in the FCC phase. AFM shows that roughness increases with increase in
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A Study of Magnetic and Dielectric Properties for Iron Ion Variation in Cobalt Ferrite SPIN (IF 1.8) Pub Date : 2023-06-02 S. Bharadwaj, Y. Kalyana Lakshmi, K. Ramya, Ch. Venkata Koti Reddy, Someshwar Pola
The influence of iron non-stoichiometry variation on structural, magnetic and dielectric properties in Cobalt ferrite is reported. Cobalt ferrite with compositional formula CoFe2±xO4 (x=0, ±0.02) was prepared through sol-gel synthesis route and sintered at 900oC/2h. X-ray diffraction confirms the phase evolution of ferrite with additional impurities belonging to α-Fe2O3 phase and this additional phase
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A Quantum States Preparation Method Based on Difference-Driven Reinforcement Learning SPIN (IF 1.8) Pub Date : 2023-05-19 Wenjie Liu, Jing Xu, Bosi Wang
Due to the large state space of the two-qubit system, and the adoption of ladder reward function in the existing quantum state preparation methods, the convergence speed is slow and it is difficult to prepare the desired target quantum state with high fidelity under limited conditions. To solve the above problems, a difference-driven reinforcement learning (RL) algorithm for quantum state preparation
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High Curie Temperature in Epitaxial D022–Mn3−xGa Ultrathin Films SPIN (IF 1.8) Pub Date : 2023-05-15 Rocío M. Gutiérrez-Pérez, Ricardo López Antón, José T. Holguín-Momaca, Sion F. Olive-Méndez
The D022–Mn3Ga ferrimagnet promises potential applications in spintronics due to its low magnetization, strong perpendicular magnetic anisotropy and high Curie temperature. In the form of thin and thick films, these properties are preserved. Here, we report on the structural and magnetic characterization of epitaxial D022–Mn2.6Ga ultrathin films with thicknesses of 2nm, 5nm and 8nm grown on Cr buffer
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Oxygen Nonstoichiometry as a Source of Ferromagnetism in GdCoO3: First-Principle Investigation SPIN (IF 1.8) Pub Date : 2023-05-08 H. Bouchama, N. Benayad, M. Djermouni, S. Kacimi, A. Zaoui
By using the density functional theory, we have studied the electronic structure and magnetism of the oxygen vacancy defect in GdCoO3 perovskite compound. We have carried out a magnetic stability calculation; between many possible magnetic configurations, the ferromagnetic ordering was predicted in both gadolinium and cobalt sublattices. We have demonstrated that the oxygen vacancy defect causes a
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Magneto-Optical Spectroscopy of Nanocomposites (CoFeZr)x(Al2O3)100−x SPIN (IF 1.8) Pub Date : 2023-04-27 Elena A. Gan’shina, Alexandr B. Granovsky, Vladimir V. Garshin, Ilya M. Pripechenkov, Alexandr V. Sitnikov, Mikhail N. Volochaev, Vladimir V. Ryl’kov, Sergey N. Nikolaev
We present results of magneto-optical investigations of (CoFeZr)x(Al2O3)100−x film nanocomposites in transverse Kerr effect (TKE) geometry in the spectral range 0.5–4.0eV and magnetic field up to 3.0kOe. Nanocomposites were deposited onto a glass-ceramic substrate by ion-beam sputtering. The TKE response at room temperature strongly depends on the wavelength of light, applied magnetic field H and the
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A Double Perovskite BiFeMoO6: Microstructural, Optical, Dielectric and Transport Properties SPIN (IF 1.8) Pub Date : 2023-04-18 B. S. Tripathy, R. N. P. Choudhary, S. K. Parida
In this communication, the synthesis (solid-state sintering) and characterization of a double perovskite BiFeMoO6 are reported. Analysis of X-ray diffraction (XRD) data provides monoclinic crystal symmetry with an average crystallite size of 85.6nm and lattice strain of 0.00078, respectively. The microstructural analysis of the sample was done using a scanning electron microscope (SEM) and the results
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First-Principles Study of Structural, Electronic, Magnetic and Half-Metallic Properties of Mn2ZrX (X = As, Bi) Full Heusler Alloys SPIN (IF 1.8) Pub Date : 2023-04-07 Ahmed Khaldi, Mostefa Zemouli, Yassine Benallou, Mehdi Damou, Kadda Amara, Mohamed El Keurti
In this paper, the structural, electronic, magnetic, and half-metallic properties of full-Heusler alloys Mn2ZrX (X=As, Bi) in the Hg2CuTi-type structure have been studied by using the first-principles-based density functional theory (DFT) with the full-potential linearized augmented plane-wave (FP-LAPW) method. Mn2ZrX (X=As, Bi) compounds are found to be half-metallic ferrimagnets. The calculated total
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Magnetic Behavior of Spin Chain with Hexagonal Shell and Negative Core-Shell Exchange Coupling: Monte Carlo Simulation and Mean Field Approach SPIN (IF 1.8) Pub Date : 2023-04-08 E. M. Jalal, A. Lafhal, H. Saadi, A. Hasnaoui, M. Madani, M. El Bouziani
Using Monte Carlo simulation and mean field approximation, we studied the magnetic properties of spin-3/2 chain with hexagonal spin-1/2 shell and negative core-shell exchange coupling. The obtained results show that the spins 3/2 in the core have an important influence on the magnetic behavior of the system such as the appearance of compensation temperatures as well as first- and second-order phase
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Half-Metallic Bandgap Measurement Using Circularly Polarized Infrared Light SPIN (IF 1.8) Pub Date : 2023-03-18 Tariq F. Alhuwaymel, Takahide Kubota, Jun-Young Kim, Koki Takanashi, Atsufumi Hirohata
One avenue toward next-generation spintronic devices is to develop half-metallic ferromagnets with 100% spin polarization and Curie temperature above room temperature. Half-metallic ferromagnets have unique density of states, where the majority spins are metallic but the minority spins are semiconducting with the Fermi level lying within an energy gap. To date, the half-metallic bandgap has been predominantly
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Sublattice Magnetizations of Ultrathin Ferrimagnetic Lamellar Nanostructures between Cobalt Leads SPIN (IF 1.8) Pub Date : 2023-03-18 Vinod Ashokan, A. Khater, M. Abou Ghantous
In this work, we model the salient magnetic properties of the alloy lamellar ferrimagnetic nanostructures [Co1−cGdc]ℓ′[Co]ℓ[Co1−cGdc]ℓ′ between Co semiinfinite leads. We have employed the Ising spin effective field theory (EFT) to compute the reliable magnetic exchange constants for the pure cobalt JCo–Co and gadolinium JGd–Gd materials in complete agreement with their experimental data. The sublattice
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Thermal and Dynamic Radiation in the THz Range Under Spin Current Injection in Magnetic Junctions SPIN (IF 1.8) Pub Date : 2023-03-18 S. G. Chigarev, L. A. Fomin, D. P. Rai, E. A. Vilkov, O. A. Byshevsky-Konopko, D. L. Zagorsky, I. M. Doludenko, A. I. Panas
An experimental approach to the problem of the energy distribution of radiation in the THz range created by an electron flow passing through a magnetic junction between thermal and dynamic is considered. The experimental results obtained during the operation of a spin-injection emitter based on an array of heterogeneous magnetic nanowires (NWs) confirmed the assumption about the “competition” of thermal
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Study of Structural, Dielectric, Electrical and Optical Properties of the Sr3CuTi4O12 Ceramics SPIN (IF 1.8) Pub Date : 2023-03-10 S. K. Parida, Tapaswinee Jena, A. Sahu, R. N. P. Choudhary
In the present investigation, the synthesis of the strontium copper titanate (Sr3CuTi4O12,SCTO) ceramic by the cost-effective solid-state reaction was reported. The structural analysis suggests a single-phase tetragonal crystal symmetry with space group P4/mmm. The average crystallite size and mechanical compressive microlattice strain are found to be 65.8nm and 0.000594, respectively. The study of
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Spin Accumulation in Acoustically Excited Ni/GaAs/Ni Trilayers SPIN (IF 1.8) Pub Date : 2023-03-10 Andrei V. Azovtsev, Nikolay A. Pertsev
In this paper, we report the first theoretical results on the acoustic generation of spin accumulation in ferromagnet-semiconductor-ferromagnet trilayers. As a representative material system, we consider a Ni/GaAs/Ni trilayer coupled to a piezoelectric transducer, which injects a planar acoustic wave into the adjoining Ni film. By combining an analytical solution of the spin diffusion equation in the
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Spin Injection in Trilayer Structures by Application of the Electric and Magnetic Fields SPIN (IF 1.8) Pub Date : 2023-03-09 M. Shahri Naseri
The spin injection efficiency in the Ferromagnetic/Nonmagnetic Semiconductor/Ferromagnetic (FM/NMS/FM) structures was studied under external magnetic and electric fields. It is found that spin injection efficiency can be strongly influenced by magnetic and electric fields. With the increase of these fields, the down-stream spin diffusion length increases and makes the spin injection efficiency increase
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High-Frequency Permeability of Adjacent Narrow Strips Having an Inclined Magnetic Anisotropy SPIN (IF 1.8) Pub Date : 2023-03-03 Tomoo Nakai
This study deals with a phenomenon of magnetic domain transition of adjacent narrow thin film strips with inclined uniaxial magnetic anisotropy. Our previous research shows that individual element with 70° inclined easy magnetization axis has a typical characteristic of the domain transition, and the transition can be controlled by the normal magnetic field. We also applied this phenomenon and controlling
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Magneto-Impedance Tomography of Composite CuBe/FeCoNi Wires SPIN (IF 1.8) Pub Date : 2023-03-03 D. A. Bukreev, M. S. Derevyanko, A. A. Moiseev, I. M. Matsyuk, A. Ballesteros, A. V. Svalov, A. V. Semirov
The results of investigation of the distribution of electrical and magnetic properties over the cross-section are presented for Cu98Be2/Fe20Co6Ni74 composite wire of the “highly conductive core-magnetically soft coating” type, obtained by electrolytic deposition of the FeCoNi layer. Studies performed by the magneto-impedance tomography (MIT) made it possible to determine the specific electrical conductivity
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Impact of Magneto-Deformation Effect in Ferrogels on the Echogenicity of Magnetic Composites SPIN (IF 1.8) Pub Date : 2023-02-27 Olga A. Dinislamova, Ilya O. Yaryshev, Antonina V. Bugayova, Tatyana F. Shklyar, Alexander P. Safronov, Zahra Lotfollahi, Felix A. Blyakhman
Basically, this study was carried out in the context of the development of ferrogel-based biocompatible soft tissue implants, in particular, for the needs of regenerative medicine and replacement therapy. The magneto-deformation effect (MDE) of ferrogels (FGs) and the possibility of its visualization with the use of medical ultrasound were in the focus of this work. The aim of this investigation was
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Study of the Critical Behavior and the Multi-Layer Transition in a Spin-1 Ashkin–Teller Model under the Effect of the RKKY Interaction: Finite-Size-Scaling and Monte Carlo Studies SPIN (IF 1.8) Pub Date : 2023-02-27 A. Benmansour, B. N. Brahmi, S. Bekhechi, A. Rachadi, H. Ez-Zahraouy
By using a Monte Carlo simulation, we have studied the effects on the multilayer transition and magnetic properties of the crystal field D∕J2, the four-spin coupling J4∕J2 and RKKY interaction in the spin-1 Ashkin–Teller (AT) model of a system composed of two magnetic multi-layer materials, of various thicknesses, separated by a nonmagnetic spacer of thickness M. By varying the strength of J4∕J2, we
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Functional Properties of Cobalt-Based Amorphous Ribbons with Different Demagnetizing Factor SPIN (IF 1.8) Pub Date : 2023-02-07 A. A. Pasynkova, A. V. Timofeeva, V. A. Lukshina
Co-based rapidly quenched amorphous ribbons are soft ferromagnets with well-adjustable functional properties. Their effective magnetic anisotropy and magnetization processes depend on the preparation conditions and geometrical parameters. It was found that giant magnetoimpedance effect (MI) for the FeCoCrSiB ribbons without heat treatments after relaxation annealing and after stress annealing at 350∘C
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Solving the Shortest Path Problem with QAOA SPIN (IF 1.8) Pub Date : 2023-01-31 Zhiqiang Fan, Jinchen Xu, Guoqiang Shu, Xiaodong Ding, Hang Lian, Zheng Shan
Graph computation is a core technique for solving realistic problems of graph representations. In solving the shortest path problem (SPP), the current classical methods are encountering a huge performance bottleneck. Attempting to solve this dilemma, we try to solve the SPP with a Quantum Approximate Optimal Algorithm (QAOA)-based quantum method. In this paper, we propose a QAOA-based shortest path