Review
Materials Science, Ceramics
Shuhan Lu, Minggang Wang, Zhankui Zhao
Summary: Soft magnetic composites (SMCs) are crucial in electromagnetic conversion, with significant role in power production, transmission, and utilization. Third-generation semiconductors require soft magnetic materials with distinct characteristics such as high response, power density, and low total loss. Fe-based amorphous soft magnetic alloys exhibit exceptional properties, including high saturation magnetization, low coercivity, and high permeability. To reduce eddy current loss, ultrathin laminating or powder composite cores are recommended. Amorphous soft magnetic composites (ASMCs) are produced through powder metallurgy techniques using insulated and/or coated amorphous soft magnetic powders. This paper presents the development history, insulation and coating preparation methods, molding preparation technology, heat treatment process, and recent achievements of Fe-based ASMCs. It also highlights future research hotspots, trends, critical concerns, development prospects, and directions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Zigui Luo, Zhenjia Yang, Shangwei Jiang, Wei Wu, Guangqiang Li, Xi'an Fan
Summary: The design of magnetic insulation coating structure has always been a challenge for high-performance soft magnetic composites (SMCs). In this study, Fe-Si SMCs with silicate/nano-Fe composite coating were prepared successfully by in-situ oxidation method combined with spark plasma sintering (SPS). The formation mechanism of the composite coating and its effect on the electro-magnetic properties of Fe-Si SMCs were investigated.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Haonan Zhang, Xichun Zhong, Jinwen Hu, Na He, Hanxing Xu, Xuefeng Liao, Qing Zhou, Zhongwu Liu, Raju V. Ramanujan
Summary: Flake-shaped FeSiCr (FFSC) material is a promising microwave absorbent due to its excellent magnetic properties and environmental resistance. By introducing carbon-based materials through suitable coatings, the performance of FFSC can be improved. In this study, graphite- and epoxy resin-encapsulated FFSC (FFSC@G/E) powders were prepared using a solution-blending method, exhibiting excellent performance.
Article
Chemistry, Physical
B. V. Neamtu, F. Popa, T. F. Marinca, I. Chicnas
Summary: The manuscript proposes a new strategy for preparing soft magnetic composites through the cold sintering process. It investigates the consolidation of ferromagnetic phase with an insulating layer and explores the influence of dielectric phase content on the magnetic properties. The feasibility of heat treatment for improving the magnetic properties of the cold sintered compacts is also examined.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Yulong Li, Yue Li, Wenqin Wang, Min Lei, Xuewen Li
Summary: Fe-based amorphous powders were added as a precoating to a nickel coating on 45 steel during the electroplating process, followed by laser remelting to form a Fe-Ni amorphous/nanocrystalline composite coating. The coating exhibited high hardness, excellent wear resistance, and corrosion resistance, with significant improvements in hardness and elastic modulus compared to the substrate.
MATERIALS CHARACTERIZATION
(2021)
Article
Chemistry, Physical
Vu Nguyen Thuc, Ho Anh Tam, Do Thi Huong Giang, Nguyen Huu Duc, Nguyen Thi Ngoc, Vu Thi Ngoc Khanh, Le Van Lich, Van-Hai Dinh
Summary: This study explores an alternative approach to manipulate the magnetic susceptibility and related properties of soft magnetic materials through geometric design, by fabricating porous honeycomb structures of Fe92.9C3.5Si3.6 amorphous ribbons with control over the wall width. The results show that the magnetic susceptibility strongly depends on the wall width of porous honeycomb structures, with smaller widths resulting in higher susceptibility, and simulations suggest that a high density of domain walls can be accommodated in structures with small wall widths, leading to tailored transitions of domain configurations under magnetic field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Bogdan Viorel Neamtu, Florin Popa, Ecaterina Ware, Traian Florin Marinca, Mihai Sebastian Gabor, Florin Pop Piglesan, Mircea Nasui
Summary: This paper investigates the influence of hydrothermal deposition processing parameters on the characteristics of ZnO layers deposited on amorphous Fe-based fibres. The study finds that using a zinc acetate-based solution of 0.05 M concentration and a deposition duration of 24 h can result in a continuous, thin and adherent layer of ZnO on the fibre surface. The ZnO coated fibres are then used to prepare fibre-based soft magnetic composites via a cold sintering process, achieving improved magnetic properties compared to crystalline fibre-based composites.
Article
Materials Science, Ceramics
Chaorun Si, Ziqian Zhang, Qi Zhang, Jin Cai
Summary: The study aimed to refine the particle size of coarse Fe-based amorphous powders through ball milling, which effectively reduced particle size and increased amorphous phase content without compromising thermal stability and soft magnetic properties.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Mingjuan Cai, Jingjing Wang, Qianqian Wang, Zhijun Guo, Qiang Luo, Jing Zhou, Tao Liang, Xuesong Li, Qiaoshi Zeng, Baolong Shen
Summary: Stress annealing is used to enhance the magnetic softness of Fe83-xCoxB10Si3C3P1 (x = 0-16) amorphous alloys with a saturation polarization of up to 1.75 T. The stress-annealed alloys exhibit improved soft-magnetic properties, including low coercivity (1.8-2.2 A/m), low core loss (0.09-0.11 W/kg at 1.0 T and 50 Hz), and high permeability (27,000-33,200 at 5 A/m and 1 kHz). The enhanced magnetic softness is attributed to the induced longitudinal magnetic anisotropy and the annihilation of free volume caused by stress annealing.
MATERIALS RESEARCH LETTERS
(2023)
Article
Materials Science, Ceramics
Jiaqi Liu, Yannan Dong, Pu Wang, Zhengqu Zhu, Jing Pang, Xiaoyu Li, Jiaquan Zhang
Summary: By investigating the effects of EP and CIP content on the soft magnetic properties of SMCs, it was found that increasing EP content from 1 to 3wt% improved the insulated coating effect and density of SMCs, resulting in decreased core losses and increased permeability. When CIP content was 0-20wt%, core losses decreased due to decreased average particle size, while in 20-70wt% CIP content range, core losses rapidly increased due to continuous decrease of resistance and increase of coercivity. FeSiBCCr/CIP SMCs with 20wt% CIP and 3wt% EP exhibited high permeability, high DC bias%, and low core losses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Engineering, Chemical
Rui Ma, Liang Chang, Yaqiang Dong, Shulong Ye, Jiajia Si, Kefu Yao, Peng Yu
Summary: Hybrid soft magnetic composites were fabricated using bimodal amorphous Fe73Si11B11C3Cr2 and crystalline Fe50Co50 powders via MIM. The addition of Fe50Co50 powder decreased the permeability but increased the saturation induction. Composites with higher fraction of Fe50Co50 exhibited better magnetic saturation and bias performances. Core loss was mainly influenced by particle size distribution, and finer Fe50Co50 powders distributed in interstices led to lower eddy current loss and core loss.
Article
Chemistry, Physical
Yuluo Li, Ningning Shen, Suo Zhang, Yidong Wu, Li Chen, Kuang Lv, Zhanbing He, Fushan Li, Xidong Hui
Summary: By designing alloy systems with amorphous/α-Fe hierarchic structures, the magnetic properties of the alloys can be improved, including enhancing the saturation magnetization and coercivity. Further improvement in the magnetic properties of the alloys can be achieved through appropriate annealing processes.
Article
Materials Science, Multidisciplinary
Jinwen Hu, Sichen Liu, Yi Wang, Wenbo Ju, Na He, Jiayi He, Haoyang Jia, Chenbin Xia, Zhengsheng Huang, Jin Long, Xichun Zhong, Zhongwu Liu
Summary: In this study, flaky FeSiAl (FSA) powders were coated with an insulation layer by manganese phosphating treatment to improve the microwave absorption properties. The optimally Mn3(PO4)2 coated FSA showed excellent anti-corrosion performance with a much slower corrosion rate compared to the naked FSA particles. This work provides a low-cost phosphating process for manufacturing corrosion-resistant microwave absorbers in the widely-used X frequency band.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Peng Zhao, Yang Luo, Dun-Bo Yu, Hai-Jun Peng, Wen-Long Yan, Zi-Long Wang, Xin-Yuan Bai
Summary: Hot-deformed magnets processed from nanocrystalline/amorphous Nd-Fe-B powders were prepared at different hot-pressing temperatures. The optimal magnetic properties were achieved at a hot-pressing temperature of 650 degrees C, with the presence of fine platelet-like grains contributing to superior magnetic performance. The accumulation of Nd/Pr-rich phase in the coarse grains' region tends to deteriorate the magnetic properties as the hot-pressing temperature increases.
Article
Chemistry, Physical
Sviatoslav Vovk, Samuel Dobak, Jan Fuzer, Peter Kollar, Radovan Bures, Maria Faberova
Summary: This study investigates the magnetic properties of soft magnetic composites (SMCs) based on Fe/SiO2/ferrite at different temperatures. The results show that an increase in temperature affects the magnetic properties, necessitating consideration of the temperature effect. By analyzing energy losses and using the Statistical Theory of Losses, the magnetic properties at different ferrite contents and temperatures are studied. Frequency-temperature maps reveal a decrease in relative permeability values above 125 degrees C, associated with the Curie temperature of ferrite. It is found that the composite with 2% ferrite achieves excellent magnetic properties, with an initial relative permeability of 84 and energy loss of 57 J/m3.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Bibhutibhusan Nayak, S. Narayana Jammalamadaka
Summary: This article presents a method for remote detection of bovine serum albumin (BSA) using modified cantilever beam magnetometry (CBM). By combining a magnetostrictive Fe70Ga30 cantilever with optical detection technique, researchers were able to detect high concentrations of BSA remotely. The results of this study demonstrate the potential of this method in estimating the magnetostriction of thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yu Hao, R. E. Camley, Z. Celinski
Summary: Magnetic particles have various applications and their magnetic state is determined by their size and the strength of an applied magnetic field. Numerical simulations were performed to study the effect of an applied field on the critical size of single-domain magnetic particles, and the critical field at which a particle becomes single-domain was determined.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Nitesh Singh, Naresh Kumar, Dharohar Sahadot, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: The unique magnetic properties of FM/AFM and hard-FM/soft-FM nanocomposite thin films have significant relevance for numerous applications. The composition and performance of different magnetic phases in the nanocomposite films can be significantly affected by the laser ablation conditions and annealing temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alya Ali Musaed, Samir Salem Al-Bawri, Khaled Aljaloud, Wazie M. Abdulkawi, Mohammad Tariqul Islam, Mandeep Jit Singh, Zaini Sakawi, Husam Hamid Ibrahim
Summary: This research presents a wideband tunable metamaterial for body-centric applications in the millimeter-wave frequency band. The proposed metamaterial has a wide operating frequency range and enhanced gain, making it suitable for improving the antenna performance in 5G wireless communication systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Haonan Li, Cong Li, Hailiang Huang, Guodong Hao, Fei Wang
Summary: The electronic structure and ferroelectric-ferromagnetic coupling properties of Y-doped and vacancy-containing GaN-ZnO heterojunctions are systematically investigated. The magnetism in vacancy-containing systems is generated by the spin polarization of unpaired electrons induced by cationic vacancies, while in Y-doped systems, bound magnetic polarons are formed by the orbital hybridization of s-state and d-state electrons of Y-doped elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Muhammad Ijaz, Hafeez Ullah, Bandar Ali Al-Asbahi, Mati Ullah Khan, Zaheer Abbas, Sana Ullah Asif
Summary: M-type BaFe11.4-xAlxCo0.6O19 hexaferrites with Al3+ substitutions were synthesized using the co-precipitation method followed by Sonochemical process. The synthesized materials were characterized using XRD, FTIR, UV-vis spectroscopy, VSM, SEM, and LCR meter. The results showed that aluminum doping decreased the band gap and enhanced the magnetic and dielectric properties of the hexaferrites, making them suitable for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg I. Utesov
Summary: The elementary excitations spectrum of anisotropic frustrated antiferromagnets in the fan phase is discussed. It is found that the low-energy part of the spectrum consists of a gapless phason branch with linear dispersion and a gapped optical branch corresponding to the fan structure amplitude oscillations. In the high-energy part of the spectrum, the excitations are similar to the magnons of the fully polarized phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alexander Ya. Simonovskii, Alexander A. Yanovskii, Arthur R. Zakinyan
Summary: In this study, the departure frequency of vapor bubbles during boiling of ferrofluid in a horizontal magnetic field is experimentally investigated. Two methods, visual and inductive, are used to measure the frequency of bubble departure. The results show that the bubble departure frequency can decrease with increasing magnetic field strength and increase with increasing temperature of the heat-emitting surface. A linear stability analysis is conducted to analyze the influence of the magnetic field on the frequency of bubble formation during ferrofluid boiling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg Heczko, Michal Rames, Vit Kopecky, Petr Vertat, Michal Varga, Ladislav Straka
Summary: Heusler Ni-Mn-Ga alloys are multiferroic materials that exhibit magnetic shape memory (MSM) phenomena. By doping transition elements into Ni2MnGa alloys, the transformation temperatures can be modified and complex behaviors can be observed, such as the variation in saturation magnetization and the effects of elemental substitution on compound properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Carlos Ariel Samudio Perez, Ariel Flaig de Marchi
Summary: This study investigates the electronic and magnetic properties of the Full-Heusler Fe2MnAs alloy using first-principles calculations. The alloy may form spontaneously and exhibits a ferromagnetic order and high spin-polarization. It can be transformed into a half-metal by contracting the lattice constant. Additionally, certain defects contribute to the spin-polarization of the alloy, making it a fully half-metallic material.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Satish Geeri, Aditya Kolakoti, Prasadarao Bobbili
Summary: In this study, an electromagnetic wave-absorbing material was fabricated using a polymer composite material with fiber orientation and Multiwall Carbon Nanotubes as filler materials, along with a Perfect Electric Conducting material. The experiments demonstrated strong electromagnetic absorbing properties for the composites with PEC-coated and non-PEC-coated materials. Mechanical, thermal, and morphological analysis confirmed the similar trend in properties. CRITIC analysis helped identify the sequence order of sustaining properties for the fabricated composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yankai Chen, Ruoxue Zhang, Yukai An
Summary: The piezoelectricity, valley character, and magnetic properties of 2H-VS2 monolayer were studied, revealing its potential applications in spintronics and valleytronics due to its bipolar magnetic semiconductor characteristics and superior physical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Leonardo S. Lima
Summary: This study investigates the thermodynamic quantities, such as entropy, specific heat, and magnetic susceptibility, in the next-nearest-neighbors Heisenberg model on a honeycomb-kagome lattice. The linear spin-wave approach is applied to obtain the temperature-dependent behavior of these quantities. Additionally, the entanglement negativity, a quantifier of quantum entanglement, and the spin Hall conductivity are also studied. The results show that all the thermodynamic quantities, as well as the entanglement negativity and spin Hall conductivity, exhibit an increasing trend with temperature. Furthermore, it is found that all the analyzed quantities approach zero in the low-temperature limit, consistent with experimental observations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxing Wang, Maximilian Kai Reimann, Wang Chen, Yikun Zhang, Rainer Poettgen
Summary: The Mo2FeB2-type compounds RE2Ga2Mg (RE = Tm, Er, Ho) exhibit a large magnetocaloric effect, making them promising for cryogenic magnetic cooling applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)