Metallic Magnetic Materials: Manufacture, Properties and Applications

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metallic Functional Materials".

Deadline for manuscript submissions: 31 January 2025 | Viewed by 2190

Special Issue Editors


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Guest Editor
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
Interests: magnetic materials; rare earth permanent magnets; soft magnets; nanostructured magnets; metallic materials
Special Issues, Collections and Topics in MDPI journals
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
Interests: magnetic materials; soft magnetic materials and devices

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Guest Editor
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
Interests: magnetic materials; rare earth permanent magnets; nanostructured magnets

Special Issue Information

Dear Colleagues,

The advancement of magnetic materials has effectively promoted the development of modern society. By definition, magnetic materials refer to materials with ferromagnetic or ferrimagnetic ordering. In a broad sense, they also include weak magnetic and antiferromagnetic materials that can provide magnetism and magnetic effects. Metallic magnetic materials is one of the most important categories of magnetic materials. They are widely used as soft magnets, hard magnets, and magnetic recordings. With special properties, they can also work as magnetostrictive materials, magnetocaloric materials, magnetic microwave-absorbing materials, etc. Since their disciovery, metallic magnetic materials have found increasing applications in motors, mechanical equipment, electronic devices, information recording, sensors, etc. The development of AI, 5G, consumer electronics, biomedicine, aerospace technology, and military industry lead to higher requirements for various types of magnetic materials, which have attrcted more and more researchers into this field in recent years.

This Special Issue is focused on the fabrication, microstructure, properties, and applications of various metallic magnetic materials, including but not limited to hard magnetic materials, soft magnetic materials, magnetocaloric materials, magnetostrictive materials, magnetoresistance materials, and magnetoelectric materials. Discussions of the preparation of metallic magnetic materials by means of traditional approaches, including casting, sintering, bonding, and plastic forming, and novel techniques, such as additive manufacturing and nanofabrication, are all welcome. We also encourage submissions related to the magnetic simulations of metallic magnetic materials by means of first principles, micromagnetic modelling, phase field calculation, etc. Work on novel magnetic structures and magnetism-related properties are particularly welcome. The magnetic technology amd magnetic characterizations related to metallic magentic materials may also be submitted. Both reviews and original articles on microstructured or nanostructured metallic magnetic materials and their applications can be accepted.

Prof. Dr. Zhongwu Liu
Dr. Hongya Yu
Dr. Youlin Huang
Guest Editors

Manuscript Submission Information

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Keywords

  • magnetism
  • metallic magnetic materials
  • magnetic simulations
  • magnetic characterization
  • magnetic structure
  • magnetic technology

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Published Papers (3 papers)

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Research

12 pages, 3149 KiB  
Article
Fine-Grained High-Permeability Fe73.5−xB9Si14Cu1Nb2.5Mx (M = Mo or W) Nanocrystalline Alloys with Co-Added Heterogeneous Transition Metal Elements
by Su-Bong An, Hyun-Ah Im, Young-Tae Kwon, Jung-Woo Lee and Jae-Won Jeong
Metals 2024, 14(12), 1424; https://doi.org/10.3390/met14121424 - 12 Dec 2024
Viewed by 572
Abstract
This study investigates the effects of multi-transition metals on the soft magnetic properties of Fe73.5−xB9Si14Cu1Nb2.5Mx (M = Nb, Mo, and W) nanocrystalline soft magnetic alloys. Nanocrystalline soft magnetic materials are [...] Read more.
This study investigates the effects of multi-transition metals on the soft magnetic properties of Fe73.5−xB9Si14Cu1Nb2.5Mx (M = Nb, Mo, and W) nanocrystalline soft magnetic alloys. Nanocrystalline soft magnetic materials are utilized in electronic components on the basis of their permeability and low core loss. In conventional alloys such as FINEMET, Nb inhibits nanocrystal growth and promotes amorphous formation. In this research, Mo and W were used as additional transition metals to control the size of nanocrystals and explore the potential for enhancing soft magnetic properties. We confirmed that the addition of Mo and W reduced the nanocrystal size, and the activation energy for nanocrystal formation and growth showed significant benefits for nanocrystalline alloys. Consequently, the soft magnetic properties of the alloys containing Mo and W exhibited higher permeability and lower coercivity. These results suggest that multi-transition metals are effective in improving soft magnetic properties by inhibiting nanocrystal formation and growth. Full article
(This article belongs to the Special Issue Metallic Magnetic Materials: Manufacture, Properties and Applications)
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13 pages, 16636 KiB  
Article
Aging Treatment to Enhance Coercivity Through Grain Boundary Modification in SmFe10V2 Bulk Magnets
by Tian-Hong Zhou, Baochao Zhang, Xing Zheng, Youngwoon Song, Pingzhan Si, Chul-Jin Choi, Young-Rae Cho and Jihoon Park
Metals 2024, 14(12), 1387; https://doi.org/10.3390/met14121387 - 3 Dec 2024
Viewed by 591
Abstract
We explored the potential for an aging treatment to achieve high coercivity, of 0.859 MA/m, in a SmFe10V2 alloy with a ThMn12-type structure. Bulk magnets were fabricated by sintering ball-milled powders, followed by aging treatment. XRD and SEM [...] Read more.
We explored the potential for an aging treatment to achieve high coercivity, of 0.859 MA/m, in a SmFe10V2 alloy with a ThMn12-type structure. Bulk magnets were fabricated by sintering ball-milled powders, followed by aging treatment. XRD and SEM analyses revealed that aging treatment promotes the formation of a Sm-rich grain boundary phase with nano-scale thickness. The high Sm content (~60–80 at.%) and low Fe content (~20–30 at.%) in the grain boundary phase led to non-ferromagnetism, enhancing the coercivity by isolating the 1–12 grains and weakening the dipolar interaction between the grains. The aging temperature and duration were optimized to maximize the Sm-rich phase and minimize the soft magnetic SmFe2 phase. This study provides a new fabrication method for ThMn12-type magnets and investigates the relationship between microstructure and coercivity, offering valuable insights for the future design and development of high-performance SmFe12-based magnets. Full article
(This article belongs to the Special Issue Metallic Magnetic Materials: Manufacture, Properties and Applications)
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14 pages, 4008 KiB  
Article
Structural, Magnetic, and Mössbauer Study on Nb and Heat Treatment of Fe-Si-B-P-Cu-Nb Ribbons
by Hyunkyung Lee, Hyunkyung Choi, Young Rang Uhm and Haein Choi-Yim
Metals 2024, 14(12), 1381; https://doi.org/10.3390/met14121381 - 2 Dec 2024
Viewed by 633
Abstract
This study aims to enhance the amorphous formation ability and magnetic properties that are crucial for the production of high-quality nanocrystalline alloys. The structural, thermal, and magnetic characteristics of the alloy ribbons were analyzed through a systematic adjustment of Nb content, and, including [...] Read more.
This study aims to enhance the amorphous formation ability and magnetic properties that are crucial for the production of high-quality nanocrystalline alloys. The structural, thermal, and magnetic characteristics of the alloy ribbons were analyzed through a systematic adjustment of Nb content, and, including Nb, significantly improved the amorphous formation ability and thermal stability of the alloy, which is vital for nanocrystalline production. By varying the Nb content within Fe85-xSi2B8P4Cu1Nbx (x = 0.0, 0.5, 1.0, and 1.5), we explored finer adjustments to achieve homogeneous amorphousness during the melt spinning process. Careful control over the Nb content facilitated the production of amorphous ribbons with consistent homogeneity, which was critical for the subsequent fabrication of nanocrystalline structures through heat treatment. As a result, the amorphous ribbon of Fe85.5Si2B8P4Cu1Nb0.5 showed a low coercivity of 7 A/m. The heat treatment showed a remarkably high saturation magnetic flux density of 1.94 T. Additionally, the grain size (D) decreased as the Nb content increased, with D values ranging from 25.09 nm to 24.29 nm, as calculated by the Scherrer formula. Mössbauer spectroscopy confirmed the formation of nanocrystalline and residual amorphous phases. The hyperfine magnetic field values (Beff) decreased from 25.7 T to 24.7 T in the amorphous samples and reached 33.0 T in the nanocrystalline phases. This study highlights Nb’s positive impact on thermal stability and amorphous formation capacity in Fe-Si-B-P-Cu alloys, culminating in the successful fabrication of nanocrystalline ribbons with superior structural and magnetic properties. Full article
(This article belongs to the Special Issue Metallic Magnetic Materials: Manufacture, Properties and Applications)
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