Article
Chemistry, Physical
N. M. Kleinerman, N. V. Mushnikov, A. V. Protasov, V. S. Gaviko, O. A. Golovnya, S. P. Naumov
Summary: The structure and magnetic state of Fe100-xNix alloys (x ≤ 20) quenched from 1100 degrees C were investigated using Mössbauer spectroscopy, X-ray diffraction, transmission electron microscopy, and magnetization measurements. The concentration dependences of the lattice parameter of bcc structure and the spontaneous magnetic moment at room temperature were measured. Mössbauer spectroscopy analysis revealed that both isomer shift and hyperfine field increased with increasing Ni content in the alloy. The structure of quenched Fe-Ni samples was found to consist of varying content bcc regions, formed as a result of separation of the alloy composition.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Hu Li, Anding Wang, Tao Liu, Pingbo Chen, Aina He, Qiang Li, Junhua Luan, Chain-Tsuan Liu
Summary: A revolutionary nanostructure design concept was proposed in this study to improve the magnetic properties of Fe-based alloys by preforming dense nuclei and refining nano-structure via transient metalloid-rich interfaces. A novel alloy composition with superior magnetic properties was developed using only 4.6 wt.% light metalloids, showing great potential as a substitute for commercial bulk Si-steels in soft-magnetic applications.
Article
Chemistry, Physical
M. Salaheldeen, A. Garcia-Gomez, P. Corte-Leon, M. Ipatov, V Zhukova, J. Gonzalez, A. Zhukov
Summary: In this study, Co2FeSi Heusler alloy glass-covered microwires were successfully fabricated and their magnetic properties were investigated. The annealing conditions were found to have a strong influence on the magnetic behavior of the samples. Anomalous magnetic behavior was observed in the annealed samples, and the structural properties were analyzed. These findings are important for the design of devices based on magnetization switching.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
M. Salaheldeen, A. Garcia, P. Corte-Leon, M. Ipatov, V. Zhukova, A. Zhukov
Summary: This article presents a new Co2FeSi glass-coated microwire with a nanocrystalline structure obtained using the Taylor-Ulitovsky technique. The annealing process significantly increased the size of the nanograins and resulted in the observation of perfect square hysteresis loops. The annealed samples exhibited dramatic magnetic behavior at low temperatures and showed critical temperature points where the magnetic behavior changed. The anomalous magnetic behavior can be attributed to the coexistence of ordered and disordered phases induced by annealing conditions. The presence of the glass coating influenced the magnetization behavior and mechanical properties of the Co2FeSi microwires.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Shumpei Fujii, Takamasa Usami, Yu Shiratsuchi, Adam M. Kerrigan, Amran Mahfudh Yatmeidhy, Shinya Yamada, Takeshi Kanashima, Ryoichi Nakatani, Vlado K. Lazarov, Tamio Oguchi, Yoshihiro Gohda, Kohei Hamaya
Summary: Research shows that electric-field control can be used to control the magnetization vectors of ferromagnetic electrodes in multiferroic heterostructures. By combining the ferromagnetic Heusler alloy Co2FeSi with the ferroelectric oxide Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT), nonvolatile and repeatable magnetization vector switchings can be achieved. This approach has the potential to reduce write power in spintronic memory architectures.
NPG ASIA MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Peiyu Cao, Fuyang Tian, Wei Li, Levente Vitos, Yandong Wang
Summary: In this study, first-principles calculations were used to investigate the effects of chemical composition and crystal disorder on the superelasticity of Ni50-xCoxM25Ga25 Heusler alloys. The research findings suggest that nonhysteretic superelasticity can be achieved within a specific range of composition and ordering, with a proposed critical parameter P-c for predicting the composition range of nonhysteretic superelastic materials.
Article
Chemistry, Physical
Yury P. Kabanov, Robert D. Shull, Chao Zheng, Philip W. T. Pong, Daniel B. Gopman
Summary: The in-plane magnetization reversal behavior of the Co2FeSi Heusler alloy free layer within a bottom-pinned magnetic tunnel junction film is studied, revealing anisotropic behavior under applied magnetic fields. Smooth, coherent rotation away from the easy axis is observed under in-plane fields perpendicular to the exchange bias direction, while asymmetric reversal behavior is seen along the easy axis.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Aun N. Khan, Luis M. Moreno-Ramirez, Alvaro Diaz-Garcia, Jia Yan Law, Victorino Franco
Summary: All-d-metal Ni(Co)-Mn-Ti Heusler alloys exhibit high magnetocaloric/barocaloric effects due to the occurrence of a martensitic transformation and excellent mechanical properties. By partially substituting Mn with Fe or Cr, the martensitic transition and magnetocaloric response can be further regulated. Cr doping increases the entropy change but reduces the magnetization difference, while Fe doping reduces the entropy change but maintains the magnetization difference. The Fe-doped alloy requires lower magnetic fields to initiate the transformation and shows higher and broader isothermal entropy change peaks.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
T. Kanomata, Y. Amako, Y. Ida, Y. Adachi, T. Osaki, T. Eto, H. Nishihara, I Shigeta, S. Imada, M. Doi
Summary: The crystal structure, permeability, magnetization, and Mossbauer spectroscopy of Co2ZrSn were experimentally investigated. The magnetic properties of Co2ZrSn were found to follow the Slater-Pauling rule. The Curie temperature of Co2ZrSn was almost independent of pressure. Mossbauer spectroscopy measurements showed that the isomer shift and hyperfine magnetic field of Co2ZrSn varied with temperature following the Brillouin function. The electronic and magnetic properties of Co2ZrSn were discussed based on the experimental results.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Dipanjan Kumar, Surafel Shiferaw Legese, Shriparna Mukherjee, Olu Emmanuel Femi, Ravishankar Narayanan, Kamanio Chattopadhyay
Summary: This study reports two quaternary multicomponent Zr-based hH alloy systems and experimentally verifies their crystal structures and compositions. The ZrNiIn0.5Sb0.5 alloy exhibits n-type semiconductor behavior within the measured temperature range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Simone Fabbrici, Francesco Cugini, Fabio Orlandi, Nicola Sarzi Amade, Francesca Casoli, Davide Calestani, Riccardo Cabassi, Greta Cavazzini, Lara Righi, Massimo Solzi, Franca Albertini
Summary: This study investigates the Curie transition of austenitic Ni-Mn-In full Heusler compounds by replacing Mn atoms with Fe or Cu. It is found that Fe and Cu modify the magnetic moments and interactions, resulting in changes in the Curie temperature and saturation magnetization of the compound. The study successfully synthesizes quinary compounds with tunable Curie temperature and high saturation magnetization, highlighting a promising strategy for designing regenerators for room temperature magnetocaloric applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Z. G. Zheng, Y. B. Chen, J. Wei, X. Wang, Z. G. Qiu, D. C. Zeng
Summary: The effects of Fe content and annealing temperature on the microstructure, thermal stability, and soft magnetic properties of Fe-rich alloys were investigated. Increasing Fe content up to 85% allowed the formation of a single amorphous phase, but beyond that, crystalline phase appeared. Higher Fe content resulted in a larger crystallization temperature interval, contributing to the process of heat treatment and preparation of amorphous/nanocrystalline soft magnetic materials. The optimum annealing treatment at 430℃ for 10 minutes yielded a high saturation magnetization of 208 emu/g.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Duong Nguyen Phuc, Dao Thi Thuy Nguyet, Luong Ngoc Anh, To Thanh Loan, Takuya Satoh
Summary: In this study, the effects of doping with Si, Al, Sn, and Bi on the atomic order, microstructure, and magnetic properties of CoMnSb samples were investigated. The results showed that the occupation of magnetic atoms in specific positions and atomic swapping could affect the magnitude of the magnetic moment and the Curie temperature. Electrical measurements indicated that the conductivity of the samples was governed by the grain boundaries and voids.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
A. Deltell, Abd El-Moez A. Mohamed, P. Alvarez-Alonso, M. Ipatov, J. P. Andres, J. A. Gonzalez, T. Sanchez, A. Zhukov, M. L. Escoda, J. J. Sunol, R. Lopez Anton
Summary: Fe substitution for Mn in Ni50Mn36-xFexSn14 alloys reduces the characteristic temperatures of the martensitic transformation and the Curie temperature of the austenite phase linearly. The applied magnetic field has a negligible effect on the martensitic transition temperatures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Surbhi Gupta, Akhilesh Kumar Patel, Sudip Mukherjee, P. D. Babu, S. D. Kaushik, K. G. Suresh
Summary: We have investigated the properties of two equiatomic quaternary Heusler alloys, CuTCrAl (T = Co and Fe), both theoretically and experimentally. Characterization using X-ray Diffraction (XRD) and neutron powder diffraction (NPD) confirmed the presence of mixed-phase A2/B2 disorder with coexistence of cubic and tetragonal symmetries. The alloys also exhibited ferrimagnetism at low temperatures and weak itinerant ferromagnetic behavior. The metallic nature of the alloys was reflected in the temperature dependence resistivity. The coexistence of cubic/tetragonal phases, ferrimagnetism, and metallic character in a single system is rare and highlights the potential of these alloys for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
