Article
Chemistry, Inorganic & Nuclear
A. Y. Mironovich, V. G. Kostishin, R. I. Shakirzyanov, A. A. Mukabenov, S. A. Melnikov, A. I. Ril, H. I. Al-Khafaji
Summary: BaFe12O19 and SrFe12O19 ferrite powders were synthesized by hydrothermal method and characterized by various techniques. The presence of secondary phases was found to significantly affect the magnetization and coercivity, with powders containing a high content of hexaferrite exhibiting excellent coercive force and potential for permanent magnet applications.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Optics
Jyoti Sahu, Sudhish Kumar, V. S. Vats, P. A. Alvi, B. Dalela, Shalendra Kumar, S. Dalela
Summary: ZnO and Zn1-xNdxO nanoparticles synthesized using the microwave assisted co-precipitation method were characterized for their optical, structural, and magnetic properties. The addition of Nd3+ led to lattice expansion, increased magnetic behavior, and reduced optical band gap. Oxygen vacancies were found to play a critical role in the weak magnetic behavior of Zn1-xNdxO nanoparticles. These nanoparticles could be used in white light display devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhaoyang Chen, Huan Niu, Jie Ding, Heng Liu, Pei-Hsuan Chen, Yi-Hsuan Lu, Ying-Rui Lu, Wenbin Zuo, Lei Han, Yuzheng Guo, Sung-Fu Hung, Yueming Zhai
Summary: In this study, sulfur-doped Fe-1-NC catalyst was found to exhibit superior activity towards ORR compared to traditional Fe-NC materials. The incorporation of sulfur in the second coordination sphere of Fe-1-NC was shown to induce a transition of spin polarization configuration, with the low spin single-Fe3+-atom identified as the active site for ORR through operando Fe-57 Mossbauer spectra. Additionally, DFT calculations revealed that the lower spin state of the Fe center after sulfur doping promotes the OH* desorption process.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Sohei Kodama, Akihiro Tanaka, Yusuke Kato
Summary: In this study, the magnetization curves of monoaxial chiral ferromagnetic spin chains were numerically simulated. The results showed that for half-odd integer S, the curves exhibited discontinuous jumps with each accompanied by a shift in crystal momentum k by an amount of pi, while for integer S, the curves were continuous with crossover processes. These characteristics suggested a change in the quantum mechanical nature of solitons with slightly stronger Dzyaloshinskii-Moriya interaction compared to ferromagnetic exchange interaction. Special limiting Hamiltonians were analyzed to understand the exact crystal momentum and reproduce the spin parity effect in the magnetization curves. The ground states of these special models were found to have substantial numerical overlap with those of generic systems with finite exchange interaction.
Article
Materials Science, Multidisciplinary
Achintya Low, Susanta Ghosh, Susmita Changdar, Sayan Routh, Shubham Purwar, S. Thirupathaiah
Summary: Magnetic topological materials exhibit strong correlations between magnetic and electronic properties, leading to various exotic phenomena. This study investigates the effects of Fe doping on the electronic, magnetic, and topological properties of Mn3-xFexSn single crystals, revealing significant changes and the emergence of a large topological Hall effect.
Article
Physics, Multidisciplinary
Yu-Hui Tang, Tai-Sheng Huang, Min-Hsiung Tsai
Summary: This study reveals that the spin-B-field coupling is too weak to directly reverse the spin components m.z/M.z. When the magnetic field reaches a threshold, it first reverses the spin polarization of free itinerant sp electrons, triggering the reversal of m.z/M.z via nonlocal exchange interactions with localized d electrons. The hysteresis effect is due to the existence of bi-stable m.z/M.z, and without a reversed magnetic field, the spin polarization of itinerant sp electrons cannot be reversed to trigger magnetic switching.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Masaki Kobayashi, Le Duc Anh, Jan Minar, Walayat Khan, Stephan Borek, Pham Nam Hai, Yoshihisa Harada, Thorsten Schmitt, Masaharu Oshima, Atsushi Fujimori, Masaaki Tanaka, Vladimir N. Strocov
Summary: A study using SX-ARPES on a prototypical n-type FMS reveals the formation of Fe-3d impurity bands just below the conduction-band minimum in InAs, leading to large spin polarization through spin-dependent hybridization. The band structure with the impurity bands varies with band filling, suggesting a unified picture for carrier-induced ferromagnetism in FMS materials that cannot be explained by the rigid-band model.
Article
Chemistry, Multidisciplinary
Emanuele Longo, Lorenzo Locatelli, Matteo Belli, Mario Alia, Arun Kumar, Massimo Longo, Marco Fanciulli, Roberto Mantovan
Summary: Large-area antimony telluride (Sb2Te3) thin films were grown using metal organic chemical vapor deposition technique, and their interaction with Fe thin films resulted in an increase in the damping parameter, suggesting the occurrence of spin pumping. Introducing a 5 nm Au interlayer between Fe and Sb2Te3 led to the development of a spin pumping signal, indicating the absence of spin-to-charge conversion in Fe/Sb2Te3. This study sheds light on the correlation among the chemical-structural-magnetic properties of the Fe/Sb2Te3 interface.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Daniel Vidal, Jordi Cirera, Jordi Ribas-Arino
Summary: Exploring the chemical space of a ligand and modulating its ligand field strength is an effective strategy for fine-tuning the physical properties of spin-crossover complexes. This computational study investigates how ligand substituent effects can modulate the transition temperature (T-1/2) in Fe(iii) SCO systems and identifies suitable descriptors for predicting these changes. The study provides insights into the design of new SCO systems with specific T-1/2 values based on ligand design.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Analytical
Alvaro Gonzalez, Valentina Zhukova, Paula Corte-Leon, Alexandr Chizhik, Mihail Ipatov, Juan Maria Blanco, Arcady Zhukov
Summary: The influence of Joule heating on the magnetic properties, giant magnetoimpedance (GMI) effect, and domain wall (DW) dynamics of Fe75B9Si12C4 glass-coated microwires was investigated. The results showed a significant increase in GMI ratio in Joule heated samples, particularly at 200 MHz. The hysteresis loops of annealed samples remained rectangular, while a slight decrease in coercivity was observed after treatment. Additionally, a modification of MOKE hysteresis loops and an improvement in DW dynamics were observed upon Joule heating.
Article
Chemistry, Inorganic & Nuclear
Emmelyne Cuza, Cle Donacier Mekuimemba, Nathalie Cosquer, Francoise Conan, Sebastien Pillet, Guillaume Chastanet, Smail Triki
Summary: Two new mononuclear Fe(II) polymorphs with the same anionic complex have been synthesized and characterized. While polymorph 2 exhibits a high-spin state throughout the temperature range, complex 1 undergoes a complete spin crossover transition at around 132.3 K.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Shengxian Han, Menghui Wang, Dianliang Cao, Yuanqing Shi, Wenran Pu, Jun Ma, Shun Zhang, Tielong Wang, Bitao Hu, Yuhong Li, Dongyan Yang, Jijin Wang
Summary: In this study, irradiation doping is used to manipulate the band gaps of Srn+1TinO3n+1 perovskite materials. Results show that the band gaps decrease with an increase in irradiation dose, and the effect of dose on band gap reduction depends on the number of layers n.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Dan Huang, Tianyu Ma, Dennis E. Brown, Saul H. Lapidus, Yang Ren, Jianrong Gao
Summary: By investigating the ferromagnetic transitions, magnetocaloric effect, and microstructure at the atomic scale in an annealed LaFe11.5Si1.5 bulk material, the coexistence of two ferromagnetic phases with different Curie temperatures was observed, contributing to a high refrigeration capacity. This phase coexistence allows for a maximum total entropy change and may potentially improve the performance of other magnetocaloric materials.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Chunwang Lv, Mingjiang Hu, Tianhao Yuan, Liqiang Yan, Hongwei Chen
Summary: The objective of this work was to investigate and contrast the mechanism of different B-site dopants for catalytic activity and sulfur resistance under equivalent conditions. The introduction of specific metal cations into the B-site of perovskite could improve catalytic activity and weaken the negative effect of SO2 poisoning. While the reasons for the improvement of catalytic activity on different doped catalysts are similar, the mechanism of sulfur resistance caused by different dopants is not identical. The optimization effect of Fe dopant is better than that of Cr and Cu dopants, illustrating that the high stability of the perovskite lattice and the insensitivity to sulfur species are the key factors for its outstanding sulfur resistance.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Shuchen Lv, Weikai Xu, Liang Bai, Wuchao Qi, Wei Wang
Summary: This study investigates the band gap tuning of stretch-dominated thermal expansion lattice metamaterials using the finite element method, and proposes a design method for tuning metamaterials through external temperature changes in multiple frequency ranges. The results show that thermal expansion materials can maintain their original thermal expansion performance while possessing tunable band gap characteristics, providing a theoretical basis for dual-objective design. The aim is to achieve tailorable coefficient of thermal expansion and tunable band gap design through material selection and shape optimization.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
K. Sedeek, H. Hantour, N. Makram, Sh. A. Said
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2016)
Article
Physics, Applied
K. Sedeek, N. Makram, H. Hantour, Sh. A. Said
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2018)
Article
Chemistry, Inorganic & Nuclear
N. A. Kotb, Ahmed H. M. Solieman, T. El-Zakla, T. Z. Amer, S. Elmeniawi, M. N. H. Comsan
APPLIED RADIATION AND ISOTOPES
(2018)
Article
Chemistry, Physical
Y. B. Saddeek, K. H. S. Shaaban, Reda Elsaman, Atef El-Taher, T. Z. Amer
RADIATION PHYSICS AND CHEMISTRY
(2018)
Article
Materials Science, Ceramics
K. Sedeek, Sh. A. Said, T. Z. Amer, N. Makram, H. Hantour
CERAMICS INTERNATIONAL
(2019)
Article
Physics, Applied
K. Sedeek, E. Abdeltwab, H. Hantour, N. Makram
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2020)
Article
Materials Science, Multidisciplinary
T. Z. Amer, Sara E. Saleh, R. M. El Shazly, N. S. Gomaa, A. A. Bahgat
JOURNAL OF NUCLEAR MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Kamilia Sedeek, Nahed Makram, Hanan Hantour, Taghreed Zaghloul Amer, Shimaa Ali Said
Summary: A detailed investigation on La-doped nanocrystalline SrZrO3 was conducted, revealing structural changes, increased crystallite size, reduced Raman modes intensity, and a decrease in optical gap width. Photoluminescence spectra showed intense violet emission post La-doping, suggesting potential technological applications like light-emitting diodes.
Article
Chemistry, Physical
Atef El-Taher, Atif Mossad Ali, Y. B. Saddeek, Reda Elsaman, H. Algarni, Kh S. Shaaban, T. Z. Amer
RADIATION PHYSICS AND CHEMISTRY
(2019)
Article
Materials Science, Ceramics
A. M. Abdel Monem, Nadia Abd-Elmohssen, H. H. El-Bahnasawy, N. Makram, K. Sedeek
Summary: Pure BiFeO3, Sr-doped Bi0.97Sr0.03FeO3, and Sr, Co co-doped Bi0.97Sr0.03Fe0.8Co0.2O3 samples were prepared using a tartaric acid-assisted sol-gel technique. The structure, lattice dynamics, magnetization, and hyperfine interaction were investigated using various techniques. The results showed that the particle sizes of the samples were in the nanoscale range, and a structural phase transition was observed in the Sr, Co co-doped sample. The magnetic properties were significantly improved in the Sr, Co co-doped sample. The findings suggest that Sr, Co co-doping can enhance the structure and ferromagnetism of BiFeO3 ceramics for potential applications.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Multidisciplinary
A. El-Denglawey, Yasser B. Saddeek, H. H. El-Bahnasawy, K. Aly, A. Dahshan, T. Z. Amer, A. A. Showahy, Kh S. Shaaban
Summary: This study explores the effect of increasing Fe2O3 content on a phosphate glass network, highlighting changes in the oxidation state of iron ions and the resulting impact on thermal parameters and stability of the network.
Article
Materials Science, Multidisciplinary
Zhiqiang Li, Xiaoxiao Hu, Zhao-Yun Zeng, Yajiang Chen, Ai-Xi Chen, Xiaobing Luo
Summary: This work demonstrates how the current phase transition of atomic Bose-Einstein condensates in a trap can be controlled by applying an oscillatory driving field. The self-trapping effect in momentum space allows for a suppression of oscillations and a nearly constant directed current. Mean-field chaos serves as an indicator of the quantum phase transition. These findings are supported by an effective three-mode model.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinqin Ye, Yi Li, Jun Ding, Heng Yu, Xianqi Dai
Summary: Constructing van der Waals heterostructures is an efficient approach to enhance the properties and broaden the applications of two-dimensional materials. This study explores the structure, stability, electronic, and optical properties of BlueP/MoSSe heterostructures using density functional theory calculations. It is found that the bandgap and band edge of these heterostructures can be effectively modulated by strain and electric field.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Simone Anzellini, Silvia Boccato, Samuel R. Baty, Leonid Burakovsky, Daniele Antonangeli, Daniel Errandonea, Raffaella Torchio
Summary: The melting line of cobalt was investigated through experimental and theoretical methods, revealing a phase transition from hexagonal close-packed structure to face-centered cubic structure at high temperatures. The melting temperatures obtained from both methods showed good agreement and can be described by a Simon-Glatzel equation. Additionally, a thermal equation of state for the face-centered cubic phase of cobalt was determined.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jiajuan Qing, Shisheng Zhou, Jimei Wu, Mingyue Shao
Summary: This paper investigates the nonlinear chaotic vibrations of fractional viscoelastic PET membranes subjected to combined harmonic and variable axial loads. The viscoelasticity of PET membrane is characterized by the fractional Kelvin-Voigt model. The reliability of the numerical strategy is proved by comparing the results with available fractional systems and examples. The influence of system parameters on chaotic behaviors is described using bifurcation diagrams and detailed responses. This research provides a fundamental framework for controlling viscoelastic substrates in flexible manufacturing.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aly R. Seadawy, Syed T. R. Rizvi, Bazgha Mustafa, Kashif Ali
Summary: In this research, the complete discriminant system of polynomial method is used to analyze the dynamic characteristics of the cubic-quintic nonlinear Schrodinger equation with an additional anti-cubic nonlinear term, with a focus on the introduction of various optical solitons and wave structures. The analysis illustrates the importance of the polynomial method and provides dynamic results for the solutions.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Ruihang Huang
Summary: This study utilized bibliometric analysis to examine the development of multi-scale calculation of carbon nanotubes. Using CiteSpace III software, 1253 relevant articles from the SCI Expanded database were analyzed to identify research trends in this field. The findings revealed significant progress in the research of multi-scale calculation of carbon nanotubes from 1999 to 2023. The analysis of keywords, literature co-citation network, and keyword cluster network provided valuable insights into the knowledge base, important research results, and research hotspots in this field. Additionally, the study predicted future hot research directions using keyword breakout analysis. The research provides profound insights and important guidance for researchers and policymakers in the field of multi-scale calculation of carbon nanotubes to promote further innovation and development.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaohua Zhou, Erhu Zhang, Shumin Zhao, Lei Zhang
Summary: A theoretic model is proposed to study the adhesion behavior of a vesicle adhering inside another vesicle in 2-D case. The model investigates the equilibrium shape equations and boundary conditions, and reveals the phase diagram and critical adhesion condition in different situations.
RESULTS IN PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xin Yi, Jia-Cheng Huo, Yong-Pan Gao, Ling Fan, Ru Zhang, Cong Cao
Summary: The paper introduces an iterative quantum algorithm based on quantum gradient descent to solve combinatorial optimization problems, verifying the effectiveness and robustness of the algorithm through numerical simulations and comparison with other algorithms. Experimental results on a real quantum computer also demonstrate the feasibility and performance of the algorithm.
RESULTS IN PHYSICS
(2024)