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Impact of Co-doped TiO2 nanoparticles on the physical properties of a nematic liquid crystal Phase Transit. (IF 1.6) Pub Date : 2024-02-17 Soumaya Alaya, Habib Ayeb, Lolwa Samet, Fathi Jomni, Taoufik Soltani
We have studied the electro-optical properties of the 4-pentyl-4-biphenylcarbonitrile nematic liquid crystal also known as 5CB doped by 0.5%wt of pure and cobalt-incorporated TiO2 nanoparticles. Th...
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The effect of f-electrons on the structural phase transition, mechanical and electronic properties in light rare-earth bismuthides Phase Transit. (IF 1.6) Pub Date : 2024-02-13 Namrata Yaduvanshi, Sadhana Singh, Aparna Chakrabarti, Dhanshree Pandey
The electronic structure, phase transition pressure and mechanical properties of light rare-earth bismuthides (PrBi, NdBi, PmBi and SmBi) have been investigated by full geometry optimization using ...
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Structure, pressure-induced phase transition, electronic and thermal properties of alkaline earth oxide compounds Phase Transit. (IF 1.6) Pub Date : 2024-01-30 S. Drablia, N. Boukhris, K. Gherbi, H. Meradji, S. Ghemid, F. Bendjedaa, V. Srivastava, R. Khenata, S. Bin-Omran
The current study reports the pressure-driven phase change, and electronic and thermal properties of strontium oxide (SrO) and barium oxide (BaO) under pressure in different phases via a density fu...
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Size-induced phase transitions Phase Transit. (IF 1.6) Pub Date : 2024-02-01 Paweł E. Tomaszewski
This paper presents a holistic view of the structural phase transitions in nanocrystals. The databases for size-induced phase transitions is a main part of this paper. The database on transitions w...
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Metallurgical and interfacial co-relation of HA-ZnO-Fe3O4 composite for implant application with properties: experimental interaction study with ANOVA and ANCOVA model Phase Transit. (IF 1.6) Pub Date : 2024-01-30 Ruchi Gupta, Vinay Pratap Singh, Mayank Agarwal
An influence of processing parameters including the effect of reinforcement particulates for HA-ZnO-Fe3O4 composites fabricated via powder metallurgy is reported in relation to the metallurgical an...
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Cinnamic acid and biphenyl core calamitic asymmetric molecules: preparation and characterization for mesomorphic properties Phase Transit. (IF 1.6) Pub Date : 2024-01-18 H. T. Srinivasa, S. Hariprasad
Some cinnamic acid and biphenyl core-derived calamitic molecules were synthesized and characterized for mesomorphic properties. Newly synthesized compounds showed well-defined schlieren textures an...
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Thermochromic response of an individual Sn:VO2 strip with multiple coexisting phase domains Phase Transit. (IF 1.6) Pub Date : 2024-01-18 De-cong Xie, Yong-xing Liu, Qing-ru Liu, Hu-wei Miao, Wei Liu, Fa-yu Wu, Hao-nan Dong
The respective roles of Sn atoms and oxygen vacancies (Ovs) on phase transition in an isolated Sn:VO2 with multi-domains were investigated through the Temperature-dependent Raman spectra and the dy...
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A new approach to the textural interpretation of magnetically aligned nematic and cholesteric lyotropic mesophases by using plate-λ accessory Phase Transit. (IF 1.6) Pub Date : 2024-01-18 D. D. Lüders, E. Akpinar, M. L. G. Pereira, N. G. C. Astrath
Lyotropic liquid crystals are substances formed by anisotropic micelles. Their unit structure change with the concentration and temperature and, as a consequence, the optical anisotropy changes. A ...
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Miscibility of porphyrin/liquid crystal floating monolayers at the air–water interface Phase Transit. (IF 1.6) Pub Date : 2024-01-18 Azher J. R. Al-Hassani, Ammar J. Al-Alwani, Vladislav N. Mironyuk, Mikhail V. Pozharov
We found that a new stable state of porphyrin monolayer can be induced by liquid crystal molecules. We measured the surface pressure per area of the monolayer at various molar fractions of liquid c...
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Investigation of the structural and electrical behaviour of Mn-substituted ZnO Phase Transit. (IF 1.6) Pub Date : 2024-01-11 Ch Kalyani, I. V. Subba Reddy, P. Raju, P. Missak Swarup Raju
Zinc oxide (ZnO) nanostructures with the general formula Zn1-xMnxO were made using a simple and affordable wet chemical coprecipitation method. X-ray diffraction (XRD), Fourier Transform Infrared (...
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Investigation of structural, dielectric and ferroelectric properties of nickel substituted BST ceramics Phase Transit. (IF 1.6) Pub Date : 2024-01-11 Radhika Choudhary, Vishal Singh, Ajay Singh, Surbhi Sachdev, Parveen Kumar
The current study demonstrates the effect of Ni-substitution on the structural, dielectric and ferroelectric properties of Ba0.90Sr0.10Ti1-xNixO3 (where x = 0.000, 0.005, 0.015 and 0.025) ceramics,...
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Chitosan and sodium carboxymethylcellulose biocomplex interaction properties for biomedical and pharmaceutical applications Phase Transit. (IF 1.6) Pub Date : 2024-01-04 Eya Chikhaoui, Emna Cherif, Etienne Herth
The naturally occurring polymers chitosan (CH) and sodium carboxymethylcellulose (CMC) have attracted the interest of researchers in a variety of biomedical and pharmaceutical applications such as ...
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Properties of the uniaxial and biaxial nematic phases of the dodecyltrimethylammonium bromide/1-dodecanol/water lyotropic mixture including azo dye and drug molecules Phase Transit. (IF 1.6) Pub Date : 2023-12-27 Erol Akpinar, Merve Tabak, Dennys Reis, Antônio Martins Figueiredo Neto
Lyotropic nematic phase properties of novel mixtures of dodecyltrimethylammonium bromide (DTMABr)/1-dodecanol (DDeOH)/water, doping with anionic azo dyes (amaranth and tartrazine) and a drug molecu...
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Investigation on the structural characteristics and polymorphic transformation mechanism of polymorphic hydrates: a case of minodronic acid monohydrate Phase Transit. (IF 1.6) Pub Date : 2023-12-09 Xuefei Gao, Liang Zhu, Chenglin Dong, Xiaoning Wang, Wenli Zhao, Xiaoyu Zhao, Yanfei Wang
The polymorphism of Minodronic acid (MDA) monohydrates (form D and form E) was investigated in this work. The results revealed that the main difference lies in the discrepancy of hydrogen bonds in ...
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Computational characterization of structural, optoelectronic and thermoelectric properties of some double half-Heusler alloys X2FeY′Sb2 (X: Hf, Zr ;Y′: Ni, Pd) Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Khadidja Berarma, Saber Sâad Essaoud, Said Al Azar, Anas Y. Al-Reyahi, Ahmad A. Mousa, Ahmad Mufleh
A full-potential linear augmented plane wave (FP-LAPW) has been used to study the structural, electronic, and optical properties of double half-Heusler alloys X2FeY′Sb2 with X≡Zr, Hf and Y′≡Pd, Ni....
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A brownmillerite electronic material LiBiFe2O5: structural, dielectric, electrical, and ferroelectric properties for device application Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Debasish Panda, Sudhansu Sekhar Hota, R. N. P. Choudhary
A lead-free brownmillerite ferroelectric material LiBiFe2O5 (LBFO) has been synthesized via a solid-state reaction technique. Using the procedure of N-TREOR method of X-ray diffraction, the crystal...
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Study on the effect of bismuth oxide on the structural, optical and dielectric properties of strontium phosphate glasses Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Zahra Ramzi, Wafaa Nachit, Samira Touhtouh, Khalil Benkhouja, Anna Zawadzka
The melt-quenching technique was used to prepare strontium phosphate glasses with bismuth oxide. The impact of replacing Bi3+ with Sr2+ on density (d), molar volume (Vm), and glass transition tempe...
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Determination of thermodynamic properties and phase transition temperatures of phenylbenzoate-based calamitic liquid crystals by inverse gas chromatography method Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Ayse Erdogan Cakar, Fatih Cakar, Hale Ocak, Selvi Karavelioglu, Belkiz Bilgin Eran, Ozlem Cankurtaran
In this study, Phenylbenzoate-based calamitic liquid crystals (LCs) were synthesized and characterized, and then the thermodynamic properties and phase transition temperatures were investigated by ...
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Theoretical study of the effects of carbon nanotubes on the rotator phase transitions of pentacosane Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Prabir K. Mukherjee
The effects of carbon nanotubes (CNT) on the rotator phase transitions of pentacosane have been studied theoretically. A model has been developed using Flory–Huggins theory of isotropic mixing and ...
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Effect of graphene nanoparticles on the isotropic to nematic phase transition Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Prabir Kumar Mukherjee
A model combining with Flory-Huggins theory of isotropic mixing and Landau theory is developed to describe the effect of graphene nanoparticles on the isotropic to nematic phase transition. The tem...
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On the critical behaviour of the N-SmA phase transition in an induced system: an exploration from high-resolution calorimetric and optical studies Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Apsari Parvin, Malay Kumar Das
A systematic study of a binary system composed of 4-n-pentyl 4′-cyanobiphenyl (5CB) and 4-n-pentyl phenyl 4-n′-hexyloxy benzoate (ME6O.5) mesogens showing an induced smectic A at different molar co...
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Thermodynamic model to study the structural and electro-optical properties of chiral antiferroelectric smectic C phase exhibited by mesogenic homologous series 3FnHBM6(s) and W-316 mixture Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Abhilasha Singh, Ayushi Rastogi, Shri Singh
Using a thermodynamic model developed by us to study the structural and electro-optical properties of SmCA∗ phase, we investigate the temperature dependence of helical pitch, tilt angle and spontan...
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A study of the crystallization kinetics of Sb-Se-Ge and Sb-Se-Ge-In chalcogenide glasses for applications as phase change materials Phase Transit. (IF 1.6) Pub Date : 2023-12-11 Anushikha Yadav, Sunanda Sharda
Chalcogenide glasses are unquestionably one of the most popular materials known for their phase change property. Phase change materials (PCM) have a key role in the field of photonics, memory devic...
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Editors note Phase Transit. (IF 1.6) Pub Date : 2023-12-01 Andrzej Hilczer, Maria Zdanowska-Frączek
Published in Phase Transitions: A Multinational Journal (Ahead of Print, 2023)
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Structural description of temperature evolution of polar clusters in PLZT relaxor ceramics Phase Transit. (IF 1.6) Pub Date : 2023-11-28 Eriton Rodrigo Botero, Ducinei Garcia, Flavio Paulo Milton, Mahmoud Alkathy, Fabio Luis Zabotto
This letter quantifies the phases by Rietveld refinement of perovskite relaxor ferroelectric ceramics of lanthanum-modified lead titanate zirconate (PLZT 9/65/35) as a function of temperature. The ...
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Comments on the paper on the properties of BaFe0.5Nb0.5O3 by R. Chakravarty et al., and published in Phase Transitions 95, 163 (2022) Phase Transit. (IF 1.6) Pub Date : 2023-11-24 Paweł E. Tomaszewski
My comments concern the significant errors in the crystallographic part of the commented paper. The diffraction patterns are erroneously analysed and the final chemical composition is different tha...
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Novel investigation by TB-mBJ potential of magneto-electronic properties and magnetic exchange coupling in vanadium (V)-doped PbTiO3 perovskite oxide Phase Transit. (IF 1.6) Pub Date : 2023-11-13 Khaled Ibn El walid Benbrahim, Imad Eddine Rabah, Mohamed Rabah, Friha Khelfaoui, Bendouma Doumi, Abdelkader Bentayeb, Mohammed Elkeurti, Nour-Eddine Benkhettou
In this paper, we investigated the structural and magneto-electronic properties, and exchange coupling in new vanadium (V)-doped PbTiO3 perovskite oxide such as PbTi1−xVxO3 compounds with compositi...
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Significant reduction of thermomagnetic hysteresis in NdMn2-xAgxSi2 (0 ≤ x ≤ 0.4) alloys Phase Transit. (IF 1.6) Pub Date : 2023-09-08 Guiquan Yao, Guoqing Zeng, Qiang Wang, Weibin Cui
In this research, the single-phase tetragon NdMn2-xAgxSi2 (0 ≤ x ≤ 0.4) alloys were prepared. It was found that the phase transition temperature was decreased by evaluating Ag substitution, which w...
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Grain size effects on dielectric properties of yttrium doped BaTiO3 ceramics Phase Transit. (IF 1.6) Pub Date : 2023-09-05 Zineb Gargar, Amina Tachafine, Didier Fasquelle, Abdelouahad Zegzouti, Mohamed Elaatmani, Mohamed Daoud
ABSTRACT Barium titanate doped yttrium ceramics with different grain sizes were prepared by a solid-state method at three different sintering temperatures. The SEM micrograph observation revealed well-developed grain morphology and a dense, homogeneous microstructure in the Ba0.98Y0.02Ti0.995O3 ceramics. However, an increase in pores was observed at 1300 °C, affecting the dielectric characteristics
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Vibrational dynamics, Hirshfeld surface and molecular docking studies by quantum computational analysis of 3-Hydroxy-4-nitrobenzaldehyde Phase Transit. (IF 1.6) Pub Date : 2023-08-25 K. Nagarajan, N. Surumbarkuzhali, K. Parimala
In the present work, we report the experimental and computational investigations of 3-Hydroxy-4-nitrobenzaldehyde (3H4NB) were examined. Comparing observed and simulated vibrational spectra allowed...
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Electrically induced orientational instability of the director in a homeotropic nematic liquid crystal cell and its effect on surface plasmon oscillations Phase Transit. (IF 1.6) Pub Date : 2023-08-23 Ivan Yakovkin, Mykhailo Ledney
ABSTRACT This study examines the electric field-induced orientational instability of the director in a homeotropically oriented nematic liquid crystal (NLC) cell. Transitions from homogeneous homeotropic state to non-homogeneous state and from non-homogeneous to homogeneous planar state were investigated. These transitions have a threshold and may exhibit hysteresis. Threshold voltages for these transitions
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High-temperature impedance properties of Sr1-xCaxTiO3 ceramics for lead-free capacitor applications Phase Transit. (IF 1.6) Pub Date : 2023-08-15 Amina Tachafine, Hicham Ait Laasri, Jean-Claude Carru, Didier Fasquelle
ABSTRACT Lead-free Sr0.6Ca0.4TiO3 ceramic was prepared by solid-state reaction route. X-ray diffraction technique showed the phase purity and identified the orthorhombic perovskite structure. Scanning Electronic Microscopy observation evidenced homogeneous morphology and dense microstructure. Electrical conduction and dielectric relaxation mechanisms at high temperature have been studied by complex
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Compositional dependence of physical parameters of Sb-doped InSe nanochalcogenide alloys Phase Transit. (IF 1.6) Pub Date : 2023-08-09 Diksha Thakur, Vir Singh Rangra
InSe is a III-VI semiconducting layered compound having potential applications in memories, solar cells, infrared sensors, switching devices and optical fibers. In this article various physical par...
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A four-parameter generalized van der Waals equation of state: theoretical determination of thermodynamic stability boundary and vapor–liquid equilibrium of vanadium, niobium and tantalum Phase Transit. (IF 1.6) Pub Date : 2023-08-03 Ramesh Arumugam, Balasubramanian Ramasamy
ABSTRACT A new four-parameter generalized van der Waals equation of state is proposed. The criteria for the applicability of the proposed equation of state in describing the thermodynamic properties of substances have been formulated. The generalized van der Waals equation of state is found to be applicable to vanadium, niobium and tantalum. To validate the generalized van der Waals equation of state
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Structural, magnetic and ferroelectric properties of magnetoelectrically coupled xBa0.95Sr0.05TiO3-(1–x)BiFe0.90Sm0.10O3 ceramics Phase Transit. (IF 1.6) Pub Date : 2023-07-25 Mohammad J. Miah, M. N. I. Khan, Mohammad Majibur Rahman, A. K. M. Akther Hossain
The standard solid state reaction method was followed to synthesize the polycrystalline xBa0.95Sr0.05TiO3-(1–x)BiFe0.9Sm0.1O3 [xBST-(1–x)BFSmO, x = 0–0.35] ceramics. The XRD pattern revealed a stru...
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Scrutinizing the effect of substrate temperature and enhancing the multifunctional attributes of spray deposited copper gallium sulfide (CuGaS2) thin films Phase Transit. (IF 1.6) Pub Date : 2023-07-20 Karthikeyan Vijayan, S. P. Vijayachamundeeswari
ABSTRACT Polycrystalline chalcopyrite CuGaS2 thin films were prepared using a spray pyrolysis route has been considered a potential material for the solar cell absorber layer. Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) studied the impact of substrate temperature in the range of 200–300˚C on surface profile and roughness. Powder X-ray diffraction disclosed that the films were
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Study of ageing and size effects in Nickel–Titanium shape memory alloy using molecular dynamics simulations Phase Transit. (IF 1.6) Pub Date : 2023-07-18 Jiayi Chen, Hemantha Kumar Yeddu
ABSTRACT The effect of ageing process at 1073.15 K on the athermal phase transformation in different nanograins (4.5, 6 and 9 nm) of Nickel–Titanium shape memory alloy is studied using molecular dynamics simulations. The martensitic transformation start temperature and transformed martensite volume decrease with decreasing grain size. The two-stage phase transformation with intermediate phase formation
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Thermal kinetics and glass stability criteria of the Se70Te20Cd10 chalcogenide glass Phase Transit. (IF 1.6) Pub Date : 2023-07-04 A. S. Farid
ABSTRACT The results of differential thermal analysis of the Se70Te20Cd10 glass under non-isothermal settings are presented and analyzed. The heating rate affects the temperature of the glass transition (Tg), the onset temperature of crystallization (Tc) and the peak temperature of crystallization (Tp). The glass transition activation energy (Eg), the crystallization activation energy (Ec), the Hurby
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Dielectric prοperties and cοmplex impedance οf the 0.69PbMg1/3Nb2/3Ο3– 0.31PbTiΟ3 relaxοr ceramic Phase Transit. (IF 1.6) Pub Date : 2023-06-27 Salma Kaotar Hnawi, Houda Lifi, Mohamed Lifi, Salam Khrissi, Khalil Benkhouja, Mustapha Ait ali
ABSTRACT Impedance spectroscopy assessed dielectric properties of PMN at a single PT concentration. Real and imaginary impedance of (1−x) PMN–xPT materials were analyzed using this technique. Through electrical impedance spectroscopy, the loss tangent factor and electric modulus were determined, leveraging research on semiconductor conduction. The study also presented the synthesis and characterization
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Influence of synthetic temperature on structural and magnetic properties of Dy substituted Ni nanoferrite Phase Transit. (IF 1.6) Pub Date : 2023-06-27 Vikas S. Shinde, Ravindra N. Chikhale
ABSTRACT Dy substituted Ni ferrite nanoparticles with composition NiFe1.95Dy0.05O4 were synthesized by using the citric acid sol–gel auto combustion method. The samples were sintered at temperatures of 400°C, 700°C, and 900°C. The X-ray diffraction measurements clearly showed the formation of a cubic spinel structure along with a small orthoferrite phase for all the sintered samples. The crystallite
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A novel nanocomposite comprising Schiff base ligand functionalized zinc sulphide nanoparticles for heavy metal detection and photocatalytic dye degradation Phase Transit. (IF 1.6) Pub Date : 2023-06-24 Subham Nath, Rohit Kumar, Shweta Bhargav, Subhojit Das, Chitraniva Datta
ABSTRACT Herein, we report the detection and removal/degradation of metal ions and dye species using nanotechnology-based approach. A Schiff base (Sb) ligand has been prepared by a solvent-less method; post which, the ligand is used for functionalizing zinc sulphide nanoparticles (ZnS NPs) in the aqueous medium. The Sb–ZnS NPs proved to be a dual probe, viz., for the detection of Pb2+, Hg2+ and Fe3+
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Physical properties of magnesium fluoride: FPLAPW Approach Phase Transit. (IF 1.6) Pub Date : 2023-06-16 Abdeldjalil Arroussi, Mohamed Ghezali, Abdelbasset Baida, Belkacem Mahfoud, Benameur Amiri
ABSTRACT MgF2 is a compound that is transparent to the full spectrum from UV to IR and is a good candidate for UV applications. Structural, optical, electronic and elastic properties of MgF2 compounds in the three phases in which our materials may crystallize have been studied using the linearized full potential self-consistent plane wave (FLAPW) method with Wu-Cohen generalized gradient approximation
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Synthesis and electrical characterizations of (Sn0.8Ti0.2)O2 electronic material Phase Transit. (IF 1.6) Pub Date : 2023-06-07 Limali Sahoo, S. Bhuyan, S. N. Das
ABSTRACT The ceramic composite electronic material of (Sn0.8Ti0.2)O2 has been synthesized through a cost-effective solid-state ceramic approach. The crystallographic tetragonal structure from the XRD spectrum, hydrophilic porous structure from SEM micrograph, dielectric, conductivity, and electrical modulus in addition to impedance spectroscopy over an extensive range of temperature and frequency have
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Octahedra tilt influencing physical properties of polycrystalline Bi0.9Co0.1FeO3 ceramics Phase Transit. (IF 1.6) Pub Date : 2023-06-06 Rajesh Raman, Giridharan Nambi Venkatesan, P. Sakthivel, I. B. Shameem Banu
ABSTRACT Recently, multiferroic materials such as BiFeO3 have fascinated researchers for their potential application in memory storage devices. However, high leakage, weak magnetism and magnetoelectric coupling in this system restrict its practical applications. To solve this, the octahedra tilt influencing electrical, magnetic and thermal properties of polycrystalline Bi0.9Co0.1FeO3 ceramics via solid
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Investigation of local structure and phase transformation in Ce-doped barium titanate and correlation with electrical properties Phase Transit. (IF 1.6) Pub Date : 2023-06-03 Md Sahanoor Islam, Jiten Ghosh
ABSTRACT BaTiO3-based materials are used as the replacement for lead-based perovskite materials for its wide dielectric applications. But the substitution of different doping elements in pure BaTiO3 drastically affects the microstructure, phase transition behavior and electrical properties. In the present work, local structure, phase transformation and dielectric behavior of BaCexTi1-xO3 (BCT) ceramics
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Impact of Ti doping and annealing temperature on structural and opto-magnetic properties of tungsten oxide (WO3) Phase Transit. (IF 1.6) Pub Date : 2023-06-03 Surbhi Chalotra, Simranpreet Kaur, Kriti, Puneet Kaur, Puneet Kaur, Parminder Kaur, D. P. Singh
ABSTRACT Pure and Ti-doped WO3 nano systems synthesized by the solid state reaction method and annealed at different temperatures, were studied for changes in structural, optical and magnetic properties. X-ray diffraction, Raman, UV–Vis, photoluminescence spectroscopy, vibrating sample magnetometer (VSM) techniques were employed for structural, optical and magnetic characterization to study the modification
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Cerium-modified single perovskite CaMnO3: structural, dielectric, and transport properties Phase Transit. (IF 1.6) Pub Date : 2023-05-24 Rajendra Meher, Rajib Padhee, S. K. Parida
ABSTRACT In this communication, the synthesis (solid-state reaction) and characterization (structural, dielectric, and transport) of the CaMn0.9Ce0.1O3 ceramic (named, CMCO) are discussed. The CMCO has an orthorhombic crystal symmetry with an average crystallite size of 108.7 nm and lattice strain of 0.00375 respectively. The grains are distributed uniformly in a very compact manner so that highly
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Effect of surface treatment on the dynamics of relaxation processes in confinement: ferroelectric liquid crystal in porous Anopore membrane Phase Transit. (IF 1.6) Pub Date : 2023-05-19 Stanisław A. Różański
ABSTRACT Dielectric properties of a ferroelectric liquid crystal 2-methylbutyl 4-decyloxybenzylidene-4’-n-aminocinnamate (DOBAMBC) confined in untreated and treated porous Anopore membrane were investigated depending on the frequency and temperature. The confinement of a ferroelectric liquid crystal in an untreated Anopore membrane leads to the disappearance of the Goldstone mode. Moreover, despite
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Temperature dependent phase transition and negative thermal expansion of Hg2Cl2 compound: insights from first-principle DFT and Born-Oppenheimer on the fly molecular dynamics calculations Phase Transit. (IF 1.6) Pub Date : 2023-05-12 Swarup Ghosh, Joydeep Chowdhury
ABSTRACT The paper is aimed to understand the key phonon modes that are responsible for the temperature dependent structural phase transition and negative thermal expansion of Hg2Cl2 compound for the first time with the aid of density functional theory and Born-Oppenheimer on the fly molecular dynamics calculations. The phonon dispersion spectra, phonon density of states and Grüneisen parameters for
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Measurement of the dynamic temperature response of electrocaloric effect in solid ferroelectric materials via thermoreflectance Phase Transit. (IF 1.6) Pub Date : 2023-05-06 Layla Farhat, Mathieu Bardoux, Stephane Longuemart, Benoit Duponchel, Ziad Herro, Abdelhak Hadj Sahraoui
ABSTRACT We propose a characterization method based on modulated thermoreflectance technique for measuring directly the electrocaloric (EC) effect. First, the EC response in BaTiO3-based multilayer capacitors (MLC) with Y5V specification was measured using thermoreflectance set-up. Further, the direct measurement method was implemented on P(VDF-TrFE) 55/45 thin films deposited on flexible PET substrate
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A study on Sm2O3-doped Ba(Zr0.02Ti0.98)O3 ceramics for sensor applications Phase Transit. (IF 1.6) Pub Date : 2023-05-04 T.S. Thejas, Benudhar Sahoo, Prasanta Kumar Panda
ABSTRACT Ba(Zr0.02Ti0.98)O3 (BZT) samples with various weight percentages of Sm2O3 (0.02–0.06) were synthesized and calcined at 1100°C for 4 h. Circular pellets were prepared using calcined powders and sintered at 1450°C for 2 h. The sintered and poled samples were used for the measurement of various electrical properties. Maximum piezoelectric charge constant (d33) of 372 pC/N obtained for 0.02 wt
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Detection of two magnetocaloric consecutive peaks in HoCo2 Phase Transit. (IF 1.6) Pub Date : 2023-04-28 Mahmoud A. Hamad, Hatem R. Alamri, Sameh M. Elghnam, Sayed M. Badawy
ABSTRACT To simulate the magnetocaloric effect (MCE) of a HoCo2 sample, a phenomenological model (PM) is used. MCE parameters are inferred from PM as the result of modelling for magnetization vs. temperature in 0.5 T. The HoCo2 exhibits two consecutive conventional MCEs with cooling via adiabatic demagnetization. HoCo2 exhibits double peak MCE behaviour. It is recommended that HoCo2 use it as a useful
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Tricritical behavior of the smectic-hexatic phase transitions in binary mixtures using the landau mean field theory Phase Transit. (IF 1.6) Pub Date : 2023-04-28 Hamit Yurtseven, Emel Kilit Dogan
ABSTRACT The smectic-hexatic phase transitions are studied by the Landau mean field theory in binary mixtures, particularly, THI-14 + MPR-6 liquid crystalline system. By considering the phase lines of SmA-Hex B, SmC-SmF (Hex F) and SmF-Hex B as the first order; SmA-SmC and SmC-SmF as the second order, in the presence of the two tricritical points (C-F-B and A-C-B), we calculate the T-X phase diagram
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Temperature-mediated phase evolution of perovskite-type CuZrO3 nanoparticles Phase Transit. (IF 1.6) Pub Date : 2023-04-20 S. Jasmine Jecintha Kay, N. Chidhambaram
ABSTRACT Herein, we report the phase evolution of perovskite-type copper zirconate nanoparticles synthesized via the coprecipitation method. The XRD investigations confirm the dominant orthorhombic CuZrO3 phase formation at 700 °C along with frail tetragonal ZrO2 and monoclinic CuO phases. XRD analysis confirms the presence of orthorhombic perovskite type CuZrO3 in the sample annealed at 700 °C with
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Comparative studies of the structural and optical properties of BiI3 and PbI2 iodide-based semiconductors Phase Transit. (IF 1.6) Pub Date : 2023-04-20 O. El Harafi, H. Lassri, N. Mliki, R. Moubah
ABSTRACT The structural and optical properties of BiI3 and PbI2 powders were compared. The x-ray diffraction results confirm that PbI2 crystallizes in a hexagonal structure, while BiI3 in a rhombohedral structure. The optical band gap Eg was found to be direct at (2.31 eV) for PbI2 and indirect (1.7 eV) for BiI3. Different fundamental optical properties such as refractive index, real and imaginary
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Structural, elemental, and electrical conduction properties of corundum-type Mg2Co2Nb2O9 Phase Transit. (IF 1.6) Pub Date : 2023-04-13 Parthasarathi Mohanty
ABSTRACT Mg2Co2Nb2O9 is a new member of the corundum-type A4B2O9 family. Its crystal structure is trigonal with space group P3¯c1. Mg and Co ions share the A-site with fifty-fifty occupancy. In Mg2Co2Nb2O9, Co exhibits a 2 + oxidation state, whereas Nb shows a reduction in the charge state from 5 + to 4 + due to the presence of vacancy-trapped electrons in Nb2O9 dimmer. The conductivity spectra analysis
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Insight into the structural, electronic, optical, and elastic properties of niobium carbide Phase Transit. (IF 1.6) Pub Date : 2023-04-08 Mohammed S. Abu-Jafar, Raed Jaradat, Mahmoud Farout, Areej Shawahneh, Ahmad A. Mousa, Khalid Ilaiwi, Rabah Khenata, Said M. Azar
ABSTRACT The structural parameters, electronic, optical, and elastic properties of Niobium Carbide (NbC) compound within four different structures: rock-salt (RS), wurtzite (WZ), cesium chloride (CsCl), and Nickel Arsenide (NiAs) are examined using the Full-Potential Linearized-Augmented Plane Wave (FP-LAPW). The exchange–correlation potential (VXC) has been treated by Perdew, Burke, and Ernzerhof's
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Phase separation kinetics of binary mixture in the influence of bond disorder: sensitivity to quench temperature Phase Transit. (IF 1.6) Pub Date : 2023-03-25 Samiksha Shrivastava, Awaneesh Singh
ABSTRACT Morphologies in phase-separating systems can significantly influence final material properties. We present extensive Monte Carlo simulation results on segregation kinetics of critical binary mixture ( 2d-Ising system) with a fraction of bond disorder introduced regularly. The effect of various quench temperatures is studied on growth kinetics and scaling properties of evolved morphologies
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Magnetoelastic effect in R2Ni2In (R = Tb and Tm) investigated by neutron powder diffraction Phase Transit. (IF 1.6) Pub Date : 2023-03-22 Stanisław Baran, Andreas Hoser, Bogusław Penc, Andrzej Szytuła
ABSTRACT Magnetoelastic effect in R2Ni2In (R = Tb, Tm), associated with the antiferro- to paramagnetic phase transition at the Néel temperature TN equal to 40 K (R = Tb) or 4.8 K (R = Tm), has been investigated by neutron powder diffraction. Rietveld refinement reveals that the orthorhombic crystal structure, reported at room temperature, is stable down to low temperatures, including magnetically ordered
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Deposition of stoichiometry – tailored amorphous Cu-S thin films by MOCVD technique Phase Transit. (IF 1.6) Pub Date : 2023-03-18 Bolutife Olofinjana, Tobiloba Grace Fabunmi, Frank Ochuko Efe, Oladepo Fasakin, Adebowale Clement Adebisi, Marcus Adebola Eleruja, Olumide Oluwole Akinwunmi, Ezekiel Oladele Bolarinwa Ajayi
ABSTRACT Deposition technique and associated deposition parameters play significant roles in determining the stoichiometry of thin films, and consequently, their properties. Herein, Cu-S thin films were deposited on a sodalime glass substrate via metal organic chemical vapour deposition (MOCVD) at temperatures between 350 and 450°C using a single solid source precursor. The deposited Cu-S films were