Article
Physics, Applied
Guohua Wu, Zhong Yu, Rongdi Guo, Zhiguang Wang, Hong Wang, Zhongqiang Hu, Ming Liu
Summary: To achieve compact and lightweight power conversion devices, MnZn ferrite doped with high-valent Sn4+ ions is used to manipulate electromagnetic properties and suppress high-frequency core losses. The Sn4+ ions mainly occupy grain boundaries rather than dissolving into the lattice, significantly impacting the electromagnetic properties. With increasing Sn substitution, initial permeability and saturation induction decrease monotonically. A Sn substitution content of 0.003 reduces core losses to 457 kW m(-3) at 3 MHz, 30 mT, and 25 degrees C, effectively suppressing eddy current loss and residual loss. The sample with Sn content of 0.003 demonstrates excellent overall electromagnetic properties, making it potentially useful in high-frequency transformers, converters, and power sources.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Bin Fu, Yaohua Yi, Ziyu Li, Zhong Yu, Chuanjian Wu, Ke Sun, Xiaona Jiang, Qifan Li, Zhongwen Lan
Summary: In this study, the effects Co2O3 addition on the soft magnetic properties and loss performance of MnZn ferrites were investigated. It was found that the Co2O3 content did not greatly affect the spinel crystal structure or microstructure of the MnZn ferrites. The saturation magnetic induction showed a maximum at 0.36 wt% Co2O3 due to the slight increase in density. The initial permeability of the MnZn ferrite was enhanced to a maximum at 0.36 wt% Co2O3, resulting in the minimum core loss under various conditions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Yao Ying, Jiawei Feng, Zhaocheng Li, Jingwu Zheng, Jing Yu, Wangchang Li, Liang Qiao, Wei Cai, Juan Li, Hui Huang, Tiejun Zhao, Shenglei Che
Summary: In this study, MnZn ferrites with added YIG nanoparticles were developed for MHz frequency applications. It was found that a small amount of added YIG effectively reduces the power loss and increases the initial permeability of MnZn ferrites. The optimal MnZn ferrite with 600 ppm added YIG showed a significant reduction in power loss, an increase in initial permeability, and good stability against temperature.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Yajing Shang, Fan Luo, Zhongxia Duan
Summary: MnZn ferrite homogeneous fibers were synthesized and used as reinforcing phase in MnZn ferrite materials. The doping of homogeneous fibers significantly affected the microstructure, magnetic, and mechanical properties of the materials. The addition of a certain content of homogeneous fibers resulted in more uniform and compact crystal structures, lower porosity, and fewer grain boundaries, leading to improved magnetic and mechanical properties. The best properties were obtained with a fiber content of about 2%.
Article
Chemistry, Physical
Yao Ying, Linghuo Hu, Zhaocheng Li, Jingwu Zheng, Jing Yu, Wangchang Li, Liang Qiao, Wei Cai, Juan Li, Daxin Bao, Shenglei Che
Summary: Densified MnZn ferrite ceramics were prepared using the cold sintering process under pressure, with an acetate ethanol solution used as the transient solvent. The effects of the transient solvent, pressure, and annealing temperature on the density, micromorphology, and magnetic properties of the sintered MnZn ferrites were studied. The cold sintering process, along with the transient solvent and high pressure, is crucial for achieving densified MnZn ferrite. Additionally, the annealing treatment is necessary to increase the density further and reduce power loss at high frequencies.
Article
Materials Science, Multidisciplinary
Xiao Ye, Zhenhua Zhang, Guohua Bai, Xiuyuan Fan, Yuting Xu, Xiaolian Liu, Kehao Feng, Xuefeng Zhang
Summary: This study prepared high-frequency MnZn ferrites using SPS technology and achieved better high-frequency performance compared to samples prepared using traditional methods. The improved performance is attributed to the introduction of a monodomain structure via SPS technology. This research provides an effective method for manufacturing high-frequency soft magnetic ferrites and will promote the development of high-performance power electronics.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Xiaoyu Wang, Shengbo Yi, Chen Wu, Guohua Bai, Mi Yan
Summary: Co2O3 and MoO3 co-doping in MnZn power ferrites can homogenize grain size, enhance electrical resistivity, compensate magnetocrystalline anisotropy, reduce domain wall displacement, effectively reduce power loss, improve temperature stability, and increase cut-off frequency by increasing the possibility of Co2+ cation entering into the spinel lattice through liquid-phase sintering.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Xiuyuan Fan, Guohua Bai, Zhenhua Zhang, Xiaolian Liu, Jiaying Jin, Jiafeng Xu, Mi Yan
Summary: In this study, high-frequency MnZn ferrites were prepared for power applications at 10 MHz using the solid-state reaction method. The sample doped with 3000 ppm TiO2 exhibited optimal magnetic properties, including an initial permeability of 792, power loss of 415 kW/m(3) (10 MHz, 5 mT, 25 degrees C), and saturation induction of 460 mT. The effects of TiO2 doping on property optimization, microstructure, and domain structure evolution were discussed, revealing the mechanisms behind the improved performance of MnZn ferrites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yingming Zhang, Yujie Yang, Dongyang Chen, Congliang Chen, Yuting Meng
Summary: The Mn1-xZnxFe2O4 (x = 0.46, 0.47, 0.48, 0.50, 0.51) ferrite materials were prepared and their effects on magnetic characteristics and microstructure were investigated. All samples were one spinel phase with no additional heterogeneous phases. The grain size varied and the power loss decreased as the zinc level increased. The P-CV value decreased with increasing Zn concentration, and the complex permeability increased.
JOURNAL OF CERAMIC PROCESSING RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Yifei Shi, Hongquan Jing, Bingbing Liu, Hui Qian
Summary: This study investigated the intensified effects of metallic iron and graphite powders addition on the magnetic properties and impedance matching of cementitious composites containing MnZn ferrite. The addition of iron and graphite powders can improve the electromagnetic wave absorption of composites by enhancing magnetic loss and dielectric loss. This leads to a reduction in the required thickness of the composites and an increase in effective bandwidth.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yifei Shi, Hongquan Jing, Bingbing Liu, Hui Qian
Summary: This study investigates the effects of metallic iron and graphite powder addition on the magnetic properties and electromagnetic characteristics of cementitious composites containing MnZn ferrite. The results show that the addition of iron and graphite powder can improve the electromagnetic wave absorption performance of the composites and reduce the optimal thickness range. Meanwhile, the mechanical strength of the composites is sufficient for building applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Automation & Control Systems
Ulrich Soupremanien, Hugo Dayde, Myriam Dalmasso
Summary: The increase in power density of power electronics depends on reducing the size of passive components. Traditional fabrication techniques for ferrites have limitations in producing cores with advanced geometrical features. Additive manufacturing or powder injection moulding are promising techniques that allow for the shaping of magnetics with unprecedented geometrical features. The study found that cores with a loading rate of 84.7 wt% had the lowest power losses, attributed to better magnetic phase purity.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xueying Wang, Huaiwu Zhang, Liang Shi, Jie Li, Lichuan Jin, Liu Cheng, Lijun Jia, Rui Peng, Dainan Zhang
Summary: By adding Bi3+ ions into BaM materials, the sintering temperature can be reduced and the magnetic properties can be controlled, resulting in a pure phase with dense microstructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Wanjiao Li, Jing Li, Xiaoling Peng, Jiaxin Xu, Yanting Yang, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: Single-phase yttrium iron garnet (YIG) ferrite was synthesized by sol-gel method and used as the insulating layer for Fe/YIG soft magnetic composites (SMCs). The Fe powders were evenly coated with the YIG ferrite. The study investigated the effect of YIG content on the soft magnetic properties of the Fe/YIG SMCs and found that the core loss decreased initially and then increased with increasing YIG content. Moreover, the Fe/YIG SMCs exhibited improved permeability compared to pure Fe when the YIG content was between 1.0 wt% and 3.0 wt%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Hai-Shan Guo, Le-Zhong Li, Rui Wang, Zhe Xiong, Yong-Li Yan, Zi-Chen Zhong, Xin Chang
Summary: The substitution of Cd2+ ions for Zn2+ ions in NiZnCo ferrites causes lattice distortion, decreases saturation magnetization, increases coercivity, increases dielectric constant, decreases dielectric loss, and decreases DC resistivity. These changes provide excellent electrical and magnetic properties, which can be beneficial for the development of high-frequency miniaturized electronic equipment.
CERAMICS INTERNATIONAL
(2022)
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)