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Influence of Ionic Conductivity in Polymer Dispersed Antiferroelectric Liquid Crystals (PDAFLC): A Comparison of Critical Fields Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2024-01-31 Tapas Pal Majumder, Abhik Halder, Rakesh Kumar Mandal
Theoretically critical unwinding field was studied using Landau free energy model of three different geometrical configuration of antiferroelectric liquid crystals. In this study, we considered the...
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Effects of high contents of dielectric inclusions on ferroelectricity in dielectric-ferroelectric nanocomposites with dimethylammonium aluminum sulfate hexahydrate Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2024-01-31 Hoai Thuong Nguyen, A. Yu Milinsky, S. V. Baryshnikov, Minh Thuyen Chau, Phan Thi Bich Thao
The present study is devoted to analyzing effects of high contents (85 wt.%) of dielectric inclusions, including nanocellulose and silicon dioxide nanoparticles, on ferroelectricity of composites w...
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First Principles Study of Electron Structure of LaxBa1-xMnO3 Crystals Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2024-01-31 A. Kh. Nabiyeva, S. H. Jabarov, N. A. Ismayilova, H. J. Huseynov
In the framework of the density functional theory electronic band structure and density of states of LaxBa1-xMnO3 solid solutions containing different concentrations of La and Ba atoms, were studie...
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Design and Characterization of Eu2+/Ln3+ Co-doped SrAl2Si2O8 Photostimulated Phosphors for Optical Information Storages Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2024-01-31 Shengyi Liu, Duan Gao, Li Wang, Wenbin Song, Jun Huang, Wenjun Zheng, Qi Zhang, Peijia Xiao
In this paper, a series of Sr0.96Al2Si2O8 phosphors doped with 0.02Eu2+ and 0.02Re3+ (where Re = Tm, Dy, Er, Nd, Sm, La, Ho) were synthesized using the high-temperature solid-phase method at 1350 °...
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From NdNiO2 to a Mott Multiferroic BiNiO2 Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2024-01-31 Hu Zhang, RuiFeng Zhang, Lulu Zhao, Chendong Jin, Ruqian Lian, Peng-Lai Gong, RuiNing Wang, JiangLong Wang, Xing-Qiang Shi
Motivated by the recently discovered superconductivity in Sr-doped nickelate oxides NdNiO2 reduced from NdNiO3 in experiments, we predict a Mott multiferroic BiNiO2 that may be obtained from BiNiO3...
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Optical analysis of RE3+ (re = Sm, Dy): MgLa2V2O9 phosphors Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2024-01-31 S. Hajira, J. Santhosh Vijitha, Sudhakara Rao Hari, K. A. Jamal Basha, V. Adinarayana, B. Sudhakar Reddy
In this work, we have prepared the RE3+(Sm, Dy): MgLa2V2O9 phosphors of different mol% by solid-state reaction approach. The obtained powder phosphors of RE3+(Sm, Dy): MgLa2V2O9 were analyzed by SE...
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A Dual-Cylinder Piezoelectric Energy Harvester Using Wind Energy Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-10-05 Guotai Wang, Lianjian Luo, Qingling Zhao, Chongqiu Yang, Hui Shen, Rujun Song
This paper proposes a Dual-Cylinder Piezoelectric Energy Harvester (DC-PEH). The cylinders generate vortex-induced vibration under the action of wind, driving the cantilever beam to deform. During ...
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Effect of a Metallic Implant on the Hysteresis of Ferroelectric BaTiO3 Ceramics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-10-05 Nataly Asul García-Morales, Jose de Jesus Agustin Flores-Cuautle, Carlos Omar González Moran, Daniel Hernández Rivera, Ernesto Suaste-Gómez
The dielectric constant and hysteresis loops of BaTiO3 ceramics with and without Pt implants were compared to determine the effect of the implant on the ceramic behavior. Ceramics with 90% relative...
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A Double-Sided Tapered Teeth Traveling Wave Ultrasonic Motor Based on In-Plane Bending Mode Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-10-05 Junlin Yang, Ye Chen, Shihao Xiao, Yijing Niu, Liang Li
In order to improve the output torque of an in-plane bending mode traveling wave rotary ultrasonic motor, a double-sided tapered teeth traveling wave rotary ultrasonic motor was proposed. The motor...
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Study of the Lattice Thermal Conductivity of Janus In2Ge2S6 and In2Ge2S3Se3 Bilayers Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-10-05 Wei Ding, Yuhang Wang, Yifeng Tao
In this paper, we investigate the lattice thermal conductivity of Janus In2Ge2S6 and In2Ge2S3Se3 bilayers by solving the phonon Boltzmann transport equation using first-principles calculations. We ...
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Optimization of MPB for Sn Substituted Lead Bismuth Zirconate Titanate Thin Films by the Electromechanical Behavior Related to Energy Storage Capacity Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-10-05 Hitesh Kumar, Pratiksha Agnihotri, Ratnamala Chatterjee, Radheshyam Rai
In this article, we examined the electromechanical behavior of Sn-substituted Lead Bismuth Zirconate Titanate thin films (PBZST thin films). Using the pulsed laser deposition technique (PLD), the t...
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SH Waves in a Half-Space Model of Functionally Gradient Piezoelectric Semiconductors with Initial Stresses Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-10-05 W. H. Wang, Li Li, M. Lan, J. H. Du
In terms of piezoelectric class (6 mm) crystal semiconductor, the propagation of shear surface waves on the half-space surface under initial stresses is studied. The initial stresses and material p...
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Novel Piezo-active 2–1–2 Composites with Sets of Large Hydrostatic Parameters Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-10-05 V. Yu. Topolov
A 2–1–2 composite with two single-crystal components is studied for the first time to highlight large hydrostatic piezoelectric coefficients dh* and gh*, figure of merit dh*gh*, and electromechanic...
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Research on a high-frequency unfilled layered symmetrical piezoelectric material with a high effective electromechanical coupling coefficient Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-06-06 Tian Rong, ChenXu Wang
Abstract As the demand for high-performance hydrophones for marine communication systems grows, this paper develops a high-frequency unfilled layered symmetrical piezoelectric material with high effective electromechanical coupling coefficient. The ktkt vibration mode of piezoelectric material is converted into k33k33 vibration mode of the piezoelectric pillar to improve the effective electromechanical
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Photoluminescence Properties of Ho3+-doped Fluoroborate Optical Glasses Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-06-06 Z. Tirupal Naik, B. Hemalatha Rudramadevi
Abstract A trivalent rare earth ion Holmium doped zinc magnesium lithium fluoroborate (ZMLB) glasses with the composition of 10ZnO-10MgO-20LiF-(60-x)B2O3-xHo2O3 (where x = 0, 0.1, 0.3, 0.5 and 1 mol%) were prepared by a well-known melt quenching procedure. The produced glass samples structural, optical, emission and decay curve characteristics have been investigated. From the X-ray diffraction investigation
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Theoretical study on the negative differential resistance behavior of N-doped GeSe monolayer Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-06-06 Caixia Guo, Wenlong Jiao, Tianxing Wang
Abstract Using a combination of non-equilibrium Green’s function (NEGF) and density functional theory (DFT), the electronic structures and transport characteristics of N-doped GeSe monolayer were investigated systematically. The calculated band structures illustrated that the doping of N atoms changed GeSe monolayer from a semiconductor to a metal. Further, a clear negative differential resistance
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Investigation of Structural and Dielectric Behavior of Ba0.7Gd0.3MoxFe12-xO19 (Where x = 0.02) Hexaferrite Ceramics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-06-06 Pratiksha Agnihotri, Abhijeet Kumar, Radheshyam Rai, Budhendra Kumar Singh
Abstract Multiferroic ceramic composites of (Ba0.7Gd0.3MoxFe12-xO19 were prepared by using the solid-state reaction method with mol% fractions of x = 0.02, The preliminary structural studies carried out by X-ray diffraction at room temperature. It reveals that the samples have a hexagonal structure ferrite phase. The impurity phase of x-Fe2O3 appear at 32 ∼ 34 degree. Debye–Scherer and Williamson–Hall
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High-frequency inlaid cylindrical piezoelectric transducer for high-sensitivity acoustics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-06-06 Tian Rong, Qinghua Luo, Chenxu Wang, Yingchun Li, GuangLe Jia, Zhaoxian Yu
Abstract This work develops a high-frequency high-sensitivity inlaid cylindrical hydroacoustic transducer by enhancing the electromechanical coupling coefficient, amplifying stress, and adopting circumferential inlaid techniques. Equivalent circuit and finite element simulation methods were used to determine the optimum parameters of the unit, then the transducer was fabricated. Tests show that the
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A ring-type traveling wave linear ultrasonic motor based on in-plane third-order modal vibration Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2023-06-06 Junlin Yang, Ye Chen, Jinbo Yang, Chaoqun Xiang, Liang Li
Abstract This paper proposes a new type of circular ring traveling wave linear ultrasonic motor with incomplete teeth. The motor’s movable slider is pressed against the end face of the tooth structure on the outer surface of the circular ring vibrator under a certain pre-pressure, four piezoelectric ceramic plates are evenly distributed at 90° intervals on the inner side of the circular structure,
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Synergistic effect of self-poled fibre based flexible lead-free KNN/P(VDF-HFP) nanofiber mat for scavenging piezoelectric energy Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-11-22 Gun Anit Kaur, Pratiksha, Mamta Shandilya, Sahil Kumar
Abstract KNN/P(VDF-HFP) based nanofiber composite was developed by using the electrospinning technique. The significant enhanced value of β-phase content on addition of KNN is evident from the XRD and FTIR spectrum. FE-SEM micrographs reveal the formation of dense and compact nanofillers and their embedment within polymer matrix results in homogenous, smooth and uniform nanofibers without any agglomeration
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CdSe thin films prepared by the homemade and cost effective spray pyrolysis technique Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-11-22 A. D. Kanwate, V.R. Panse, E. U. Masumdar, Endah Kinarya Palupi, Rofiqul Umam, Ardimas, Ganesha Antarnusa
Abstract The CdSe thin film was deposited on glass substrate by homemade spray pyrolysis technique at substrate temperature 3000C. Further the film was characterized through X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Energy dispersive X-ray analysis (EDAX), UV-Visible optical spectroscopy and Electrical. The XRD pattern of CdSe film shows polycrystalline hexagonal
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Structural, Magnetic Evaluation of Neodymium Doped Nickel-Zinc-Iron Soft Spinel Metal Oxides for Humidity Sensor Applications Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-11-22 G. V. Nagesh, B. Rajesh Babu, K. V. Ramesh
Abstract A series of combustion assisted low-temperature neodymium substituted Ni–Zn–Fe (NZF) nanoparticles were synthesized to unravel the impact on functional behavior of NZF due to the presence of larger Nd ions. The nanopowders were structurally evaluated with X-ray diffraction and infrared spectroscopy measurements without further heat treatment. X-ray diffraction clearly evident the monophasic
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The failure probability assessment model of piezoelectric materials under electric fatigue load Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-11-22 Xianghua Chen, Qun Li, Chunguang Wang
Abstract The service life of piezoelectric devices is significantly affected by the electric fatigue load. The randomness of loads and nonuniformity of material properties caused by random distribution of internal defects in piezoelectric body will lead to the dispersion of the failure life of piezoelectric devices. Predicting failure probability of piezoelectric materials under electric fatigue load
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Structural and Electrical Properties of Pb (Mg1/3Nb2/3) O3-Pb (Yb1/2Nb1/2) O3-PbTiO3 Ternary Ceramic for Energy Storage Application Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-11-22 Venkatraj Athikesavan, S. Bhuvana, G. Thilakavathi
Abstract The polycrystalline ternary ferroelectric ceramic of PMN-PYN-PT (PMN = PbMg1/3Nb2/3O3, PYN = PbYbl/3Nb2/3O3, PT = PbTiO3) were synthesized by conventional solid state reaction technique. The structural, electrical and energy-storage properties of the ceramic were investigated. X-ray diffraction studies reveal that the ceramic has a coexistence of both tetragonal and rhombohedral phases. Dielectric
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Effect of microwave sintering on KNN-based lead free ceramics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-07-13 Yang Zhang, Qingshan Dai, Jiarui Huang, Jiwei Zhai
Abstract Microwave sintering has been known as the effective method to prepare ceramics. In this study, the microwave sintering method was used to synthesize 0.96(K0.5Na0.5)0.95Li0.05Nb0.93Sb0.07O3-0.04CaZrO3 ceramics. The effect of holding time on the properties of ceramics was investigated. With the holding time of 30 min, the excellent piezoelectric properties (d33 = 286 pC/N) can be achieved.
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Critical magnetic behavior of the half Heusler alloy RhCrSi: Monte Carlo study Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-07-13 S. Idrissi, S. Ziti, H. Labrim, L. Bahmad
Abstract In this paper, we study the critical magnetic properties of the Half Heusler alloy RhCrSi, using Monte Carlo simulations (MCS) under the Metropolis algorithm. In fact, to study this alloy, we apply an Ising model using the MCS simulations, we concentrate only on the magnetic atoms: Rh and Cr. For this purpose, these magnetic atoms are modeled by the spin moments S = 5/2 for Rh atoms and σ = 2
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Phase transition and ferroelectricity of composites based on ferroelectric metal-organic framework of [NH4][Zn(HCOO)3] Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-07-13 Hoai Thuong Nguyen, Minh Thuyen Chau, Thi Bich Thao Phan, A.Yu. Milinskiy, S.V. Baryshnikov
Abstract The study suggests a simple approach to improve phase transition properties and ferroelectricity of a typical ferroelectric metal-organic framework of [NH4][Zn(HCOO)3] (AmZn) using silicon dioxides nanoparticles (nSiO2). It is shown that the first-order transition type of AmZn is not changed under the influence of nSiO2. Moreover, the phase transition temperature of AmZn significantly increased
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Structural and photoluminescence properties of a trivalent rare earth Sm ion-doped PVA/PVP blend polymer films Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-07-13 C. Salma, B. Hemalatha Rudramadevi
Abstract Transparent polyvinyl alcohol (PVA)/polyvinylpyrrolidone (PVP) and various concentrations of Sm3+ ion-doped PVA/PVP blend-polymer films were prepared using the solution cast method. The structural properties were studied by using XRD and FTIR. Optical UV-Vis, photoluminescence, and decay studies were carried out for prepared PVA/PVP blend polymer films. The XRD confirms the structural change
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Influence of sample thickness and cross-sectional area on flexoelectric effect under one-dimensional impact Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2022-07-13 Taotao Hu, Yu Li, Peng Tu
Abstract The shock wave generates the strain gradient and consequent electric polarization in samples due to the flexoelectric effect during the impact process. At present, some scholars have studied the influence law of different impact velocities, but the influence of different thickness and cross-sectional area of samples on flexoelectric effect is still blank. In this letter, we have studied the
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Correction Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-12-16
Published in Ferroelectrics Letters Section (Vol. 49, No. 1-3, 2022)
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Exchange bias and vertical shift of the magnetic hysteresis loop in Co/BiFeO3 bilayers Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-11-06 Liyan Wang, Changzheng Wang
Abstract To reveal the mechanism of interfacial exchange coupling, the magnetic hysteresis (M-H) loop of Co/BiFeO3 bilayers deposited on (001) LaAlO3 (LAO) substrates by magnetron sputtering was measured. The M-H loop displays a horizontal shift along the field axis coexisting with a vertical shift along the magnetization axis. The frozen uncompensated interfacial spins result in the EB effect, as
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Stress induced potential barriers in composite piezoelectric semiconductor fibers in extension Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-11-06 Shuai Ju, Haifeng Zhang, Jiashi Yang
Abstract We study the extension of composite fibers with piezoelectric dielectric layers and nonpiezoelectric semiconductor layers. A theoretical analysis is performed using the one-dimensional macroscopic model of piezoelectric semiconductor fibers. An analytical solution is obtained for a fiber with a uniform nonpiezoelectric semiconductor layer and piecewise uniform piezoelectric dielectric layers
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Investigation on microscopic mechanisms of high-Curie temperature PMN-PH-PT piezoelectric ceramics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-11-06 Rongfeng Zhu, Bijun Fang, Xiangyong Zhao, Shuai Zhang, Xiaolong Lu, Jianning Ding
Abstract High-Curie temperature (TC) piezoelectric ceramics 0.15Pb(Mg1/3Nb2/3)O3-0.38PbHfO3-0.47PbTiO3 (0.15PMN-0.38PH-0.47PT) were fabricated via the citrate method, which shows pure perovskite structure. The ceramics have composition locating at the rhombohedral side around the morphotropic phase boundary (MPB), and present enhanced electrical properties as compared with those prepared by the solid-state
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High-frequency wide beam underwater transducer based on 1–3 piezocomposite Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-11-06 Chao Zhong, Junan Xu, Shaohua Hao, Yanjun Zhang, Likun Wang, Lei Qin
Abstract In order to increase the beam width of high-frequency underwater transducer, ellipsoidal cap and spherical cap transducer based on 1–3 piezocomposite were designed and fabricated. Finite element simulation was used to analyze transmitting voltage response level and beam directivity curve of the transducer. The transducer was fabricated by the curved 1–3 piezoelectric composite. Compared with
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Optimized testing of package for stacked piezoelectric energy harvester in roadway applications Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-11-06 Peng Wang, Run Cheng, Guangya Ding, Jun Wang, Zhiming Liu, Haofeng Zhang
Abstract Piezoelectric energy harvester (PEH) applied in collection and conversion of mechanical energy on roadway has attracted widely attentions in recent years. This study aims to improve a new type of road-compatible stacked PEH (sPEH), which consists of six PZT stacked piezoelectric transducers connected in parallel and a matched package to better the output efficiency and working life of sPEH
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Monte Carlo simulation for predicting neutron-induced single-event upset in ferroelectric random access memory Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-11-06 Hong Zhang, Jing Huang, Hong Xia Guo, Zhi Feng Lei, Bo Li
Abstract The influence of the single event effects (SEE) induced by neutron up to 14 MeV on ferroelectric random access memory (FRAM) is simulated by the Monte Carlo method. Simulation results show that single-event upset (SEU) occurs in FRAM when the neutron energy is greater than 6 MeV, and the average energy deposition of neutrons in the sensitive volume increases with increasing neutron energy
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Optical induction in K0.5Na0.5NbO3 ferroelectric ceramic at low calcination temperature by sol-gel route Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-11-06 Shammi Kumar, Mamta Shandilya, Nagesh Thakur
Abstract K0.5Na0.5NbO3 ceramic was synthesized at low calcination temperature by sol-gel route. Structural properties of ceramic were investigated by X-ray diffractometer, FESEM and FTIR spectrometer. Electro-optical properties of ceramic were investigated by UV-Vis and PL spectrometer. Dielectric nature of ceramic was studied at different frequencies and temperatures which disclosed that ceramic has
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On the Capacitance of Piezoelectric Metal–Insulator–Semiconductor Junctions Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-07-21
Abstract We study the capacitance of piezoelectric metal–insulator–semiconductor junctions. The linearized macroscopic theories of piezoelectric dielectrics and semiconductors are used. An analytical solution is obtained with an explicit expression for the junction capacitance. The contribution from the semiconductor part is characterized by the Debye length. When the semiconductor part is long compared
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Influence of moisture on ferroelectric–paraelectric phase transition of a composite containing oxidized MWCNT and TGS Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-07-21
Abstract This work reports experimental results for investigating the effects of residual water on phase transition in triglycine sulfate (TGS) filled with 5 wt% of oxidized multiwalled carbon nanotubes (OMWCNTs) under a relative humidity of 90% for different storage time. A similar composite containing TGS and non-oxidized MWCNT was also synthesized for comparison. According to measured data, the
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Optical properties of [Ta2O5]1-x[TiO2]x, (x = 0.08) thin films Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-07-21
Abstract Thin films of [Ta2O5]1-x-[TiO2]x, with x = 0.08, were deposited on quartz substrates (for optical study) and p- type mono- crystalline silicon (100) surfaces (for structural characterization and electrical measurements) by RF magnetron sputtering of [Ta2O5]0.92-[TiO2]0.08, ceramic target, using argon as sputtering gas and oxygen as reactive gas. Films were deposited at room temperature and
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Effect of alternative mechanochemical method on modified bismuth titanate Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-07-21
Abstract Bi4 – x La x Ti3O12 (BiLT, x = 0.60–1.00) ceramics have been successfully synthesized by the alternative mechanochemical method and investigated their structural, microstructure, dielectric, and ferroelectric properties. Based on thermal stability of synthesized samples, compounds were calcined at 750 °C. No secondary phase is observed in the powder X-ray diffraction patterns. Plate-like shape
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Effect of annealing temperature on electrical properties of Al/ZrO2/p-Si MOS capacitor Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-07-21
Abstract The present study reveals that ZrO2 MOS capacitor has been fabricated by RF sputtering technique. The maximum refractive index has been found to be 2.29 at 400 °C. From capacitance-voltage graph, it has been observed that the memory window and accumulation capacitance has been found to be maximum at 400 °C. The maximum memory window and accumulation capacitance has been found to be 0.50 V
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Low temperature investigation on dielectric properties of carbon doped copper oxide Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-07-21
Abstract Carbon-doped copper oxide (CuO)1 -x C x (x = 0, 0.05 and 0.1) samples were synthesized by solid state reaction method, and sintered at 850 °C for 12 h. An X-ray diffraction (XRD) result shows that the structure of the samples was monoclinic. Dielectric studies were carried for these samples in the temperature range 80 K − 300 K between the frequency range 20 Hz − 1 MHz via impedance analyzer
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Physical properties of Pb(Mg1/2W1/2)O3-Pb(Ni1/3Nb2/3)O3-Pb(Zr,Ti)O3 ceramics doped with tungsten oxide for haptic display actuator Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2021-07-21
Abstract In this study, for developing the low temperature sintering ceramics for speaker using piezoelectric actuator, Pb(Mg1/2W1/2)O3-Pb(Ni1/3Nb2/3)O3-Pb(Zr,Ti)O3 [PMW-PNN-PZT] ceramics doped with PbO, CuO, and WO3 as sintering aids were manufactured, and their microstructural, dielectric, and piezoelectric properties were investigated. At 0.3 wt% tungsten oxide (=WO3) added specimen sintered at
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Coexistence of phases and interphase boundaries in BaTiO3 Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-03-26 T. A. Liebsch, V. L. Sobolev
Abstract A theoretical analysis of the internal structure of interphase boundaries separating domains of coexisting phases is presented for the perovskite ferroelectric BaTiO3. The temperature dependence of interphase boundary widths and surface energies are calculated and compared with the corresponding parameters for different types of domain walls existing within the ferroelectric phases of BaTiO3
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Rietveld analysis and negative dielectric behavior of perovskite-like La1–xEuxMnO3 system Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-03-26 Shilpa Kumari, Radheshyam Rai, Pawan Kumar, Poonam Kumari, Alexey Dronov
Abstract In this article, we report the results of the Rietveld and impedance analysis of Eu doped La1–xEuxMnO3 (LEMO; x = 0.10, 0.30, and 0.50) perovskite manganites synthesized by solid-state reaction method. Structural studies through Rietveld analysis confirm that a mixed-phase nature of all LEM samples having a hexagonal unit cell structure with a less detectable impurity (Eu2O3) ceramics. The
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Effect of insulator layer thickness on electrical properties of Al/BiFeO3/ZrO2/p-Si for nonvolatile memory applications Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-03-26 Amit Singh, Chandravilash Rai, Sanjai Singh
Abstract BiFeO3 (BFO) and ZrO2 have been deposited on p-type (100) silicon substrate by sol-gel process and rf sputtering method, respectively. Metal-ferroelectric-insulator-semiconductor capacitor has been fabricated with 100 nm BFO and 10 nm ZrO2 shows maximum memory window of 1.54 V as compared to other fabricated capacitors with 5 and 15 nm insulating layer thickness. Improvement in current density
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To study the effect of low temperature crystal growth on the structural and ferroelectric properties of lead-free BCT-BZT ceramic Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-03-26 Shweta Thakur, Mamta Shandilya, Manuel Pedro Fernanades Graça, Manuel Almeida Valente
Abstract Barium Zirconate Titanate-Barium Calcium Titanate (BCT-BZT) is one of the lead-free systems, which exhibits remarkable ferroelectric properties akin to lead-based perovskite materials. In this study, we have synthesized x(Ba0.85Ca0.15)TiO3-(1−x)Ba(Zr0.15Ti0.85)O3 (where x = 0.4, 0.5, 0.6) monophonic powders by hydrothermal method at 150 °C. X-ray diffraction reveals the pure tetragonal phase
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Microstructure and dielectric properties of 0-3 connectivity lead-free BCTS-Portland cement composites Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-03-26 Ruamporn Potong, Rattiyakorn Rianyoi, Arnon Chaipanich
Abstract The 0-3 connectivity lead-free barium calcium stannate titanate (BCTS)-Portland cement (PC) composites were produced by pressing and curing techniques. The effect of BCTS ceramic content on microstructure and dielectric properties of composites were studied. Scanning electron microscope images at the interfacial zone of composites showed denser microstructure between Portland cement matrix
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Mechanism analyses of differential and static dielectric constants in ferroelectrics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-03-26 Yong C. Gan, Wan Q. Cao
Abstract The dielectric constant measured by the LCR-meter is a differential-type, and is not equivalent to capacitivity. Capacitivity of ferroelectrics is the dielectric constant corresponding to electric hysteresis loop. Two kinds of dielectric constants are investigated based on the P-E loop mechanisms: turning effect of dipoles toward electric field direction, electric field-induced polarization
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Relaxor-like behavior of mechanically activated ultrafine SrTiO3 Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-01-24 L. N. Korotkov, O. M. Bulgakov, A. I. Bocharov, F. D. Al Jaafari
Abstract Dielectric properties of nanostructured strontium titanate samples sintered from nanoparticles obtained by grinding of previously synthesized SrTiO3 and nanoparticles obtained by chemical deposition were studied in the temperature range 10–300 K. The first sample shows the characteristic features of a relaxor ferroelectric. The dispersion of the dielectric response observed in the vicinity
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Phase composition of channel proton-exchanged waveguides in different near-congruent LiNbO3 Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-01-24 Sergey M. Kostritskii, Yuri N. Korkishko, Vyacheslav A. Fedorov, Oleg G. Sevostyanov, Irina M. Chirkova, Edvard Kokanyan, Michel Aillerie
Abstract Micro-Raman spectroscopy and method of Raman data calibration are proposed for the quantitative study of the proton-exchanged LiNbO3 channel waveguides, which contain the different HxLi1–xNbO3 phases, depending on the fabrication conditions. The spectroscopic parameters, phase composition and electro-optic properties of these waveguides have been found to be depending on the small variation
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Rational analysis of processes of (first-order) ferroelectric phase transition and those of ferroic hysteresis Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-01-24 Shu-Tao Ai, Shao-Yin Zhang, Jin-Song Wang, Yuan-Zhen Cai
Abstract From the view-point of non-equilibrium (or irreversible) statistical thermodynamics, the similarities and differences between the processes of (first-order) ferroelectric phase transition and those of ferroic hysteresis were compared. They are all irreversible. The former are local and rate-dependent, at the meanwhile, the latter are non-local and rate-independent.
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Design and preparation of high-frequency transducer with broadband and wide-beam properties Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-01-24 Chao Zhong, Lei Qin, Li-kun Wang
Abstract A piezoelectric composite transducer was developed in this study to improve the bandwidth and beamwidth of the high-frequency transducer. The piezocomposite was designed as arc-shaped to expand the beamwidth, and the matching layer technique was adopted to increase the bandwidth. The directivity function was obtained by the acoustic field theory. The parameters of the matching layer were also
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Reducing the resonant frequency difference of piezoelectric transformers parallel system with mechanical coupling Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-01-24 Weidong Diao, Xinxin Liao, Zhihua Feng
Abstract The resonant frequency difference of piezoelectric transformers (PTs) with a classical parallel connection could worsen system performance, then the mechanical coupling of PTs was proposed to avoid the disadvantage. Experimental results showed that when the difference was relatively small, the performance of the classical parallel system and proposed mechanical coupling system was similar
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A high-quality factor dielectric resonator antenna for use in a wireless high-temperature sensor Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2020-01-24 Chih-Hung Li, Yih-Chien Chen, Tse-Lung Lin, Cheng-Chien Kuoa
Abstract The microwave dielectric properties of (Mg0.93Ni0.07)2SnO4 ceramics were examined with a view to their exploitation for wireless high-temperature dielectric resonator antenna temperature sensor. A dielectric constant of 8.1, a quality factor of 124,200 GHz, and a temperature coefficient of the resonant frequency of −67 ppm/°C were obtained for (Mg0.93Ni0.07)2SnO4 ceramics that were sintered
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Mechanism of double-loop and double-dielectric-peak in antiferroelectrics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2019-12-03 Wan Q. Cao, Yao C. Yue, Shao H. Qu, Ke Y. Zheng, Rui K. Pan, Ya J. Qi, Lei Zhang
Abstract Antiferroelectric double loops and double dielectric peaks occurred at an electric field circle synchronously are confirmed theretically by solving the kittel’s function with the idea of different responses of dipoles to applied electric field (E) in E-direction and anti-E-direction in antiferroelectrics. By solving problem of inversion of dipoles to ferroelectric phase controlled by thermodynamic
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Switching related activation field for polarization-reversal and for polarization-saturation in PVA based NaNO2–CsNO3 mixed system composite films fabricated at moderate elevated temperature Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2019-12-03 Lakhbir Singh, Baljinder Kaur, Tarun Garg, Arvind Nautiyal, Navneet Dabra, Jasbir S. Hundal
Abstract We investigated switching behavior in PVA based NaNO2-CsNO3 mixed system composite films fabricated at moderate elevated temperature. The switching transients in ‘ceramic-polymer mixed system’ exhibiting best ferroelectric response optimized with CsNO3 mole% 0.09 have been analyzed by two different approaches. Following Landauer approach, an activation field is calculated by measuring the
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Integration of Sr0.8Bi2.2Ta2O9/HfO2 ferroelectric/dielectric composite film on Si substrate for nonvolatile memory applications Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2019-12-03 Rajesh Kumar Jha, Prashant Singh, Manish Goswami, B. R. Singh
Abstract Sr0.8Bi2.2Ta2O9 (SBT) ferroelectric and HfO2 dielectric layers were successively deposited onto the p-type (100) Si substrate via RF sputtering. Metal-Ferroelectric-Insulator-Silicon (MFIS) capacitors were fabricated with 200 nm SBT and 10 nm HfO2 film shows the improved memory window of 1.811 V as compared to the 1.27 V in Metal-Ferroelectric-Silicon (MFS) structures. Improvement in leakage
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Theoretic research on recoverable energy release in antiferroelectrics Ferroelectr. Lett. Sect. (IF 0.4) Pub Date : 2019-12-03 Shao H. Qu, Qi Zhao, Ke Y. Zheng, Rui K. Pan, Lei Zhang, Zhi Zhong, Wan Q. Cao
Abstract Energy storage is one of the major applications of antiferroelectrics due to their large energy releasing density and stronger releasing power. Theoretic researches demonstrate following results. An antiferroelectric state exists above Curie temperature. When temperature is higher than this interim antiferroelectric state, an energy storage peak appears with extremly low discharging current