Magnetic Anisotropy Around Grain-Boundaries in Rare-Earth Magnets and Their Coercivity

被引：0

作者：

Yoshioka, Takuya ^{[1
]}

Tsuchiura, Hiroki ^{[1
]}

机构：

[1] Tohoku Univ, Dept Appl Phys, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS | 2017年 / 81卷 / 01期

关键词：

neodymium-iron-boron; first-principles calculation; crystal field theory; magnetic anisotropy; coercivity; micromagnetic simulation; FIELD;

D O I：

10.2320/jinstmet.JA201604

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Recently, several experimental studies for sintered Nd-Fe-B magnets have shown that their coercivity can be decisively affected by atomic structures around the grain boundaries in the magnets. In this article, a theoretical review is given on possible coercivity reduction mechanisms in sintered Nd-Fe-B or rare-earth based permanent magnets by focusing on the anomalous local magnetic anisotropy found for Nd ions on interfacial structures, based on first-principles calculations and an effective spin model.

引用

页码：19 / 25

页数：7

共 50 条

[41] Coercivity in lean rare earth NdFeB and PrFeB nanocomposite hard magnetic materials
David, S
Givord, D
JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 281 (01) : 6 - 11
[42] Non-uniform distribution of rare-earth elements causing high-coercivity in temperature-compensated (SmEr)2Co17 magnets
Long, Zan
Zhang, Chaoyue
Li, Yuqing
Zhang, Baoguo
Wu, Qiong
Yue, Ming
MATERIALS LETTERS, 2025, 385
[43] Magnetic anisotropy of Pm impurity in rare earth–nickel compound
K. Nishimura
K. Mori
S. Ohya
S. Muto
W.D. Hutchison
S.J. Harker
D.H. Chaplin
Hyperfine Interactions, 1999, 120-121 : 203 - 207
[44] Consolidation of cobalt nanorods: A new route for rare-earth free nanostructured permanent magnets
Ener, Semih
Anagnostopoulou, Evangelia
Dirba, Imants
Lacroix, Lise-Marie
Ott, Frederic
Blon, Thomas
Piquemal, Jean-Yves
Skokov, Konstantin P.
Gutfleisch, Oliver
Viau, Guillaume
ACTA MATERIALIA, 2018, 145 : 290 - 297
[45] Hydrothermal synthesis and magnetic properties of multiferroic rare-earth orthoferrites
Zhou, Zhiqiang
Guo, Li
Yang, Haixia
Liu, Qiang
Ye, Feng
JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 583 : 21 - 31
[46] Magnetic properties of a new family of rare-earth substituted ferrites
Grössinger, R
Blanco, CT
Küpferling, M
Müller, M
Wiesinger, G
PHYSICA B-CONDENSED MATTER, 2003, 327 (2-4) : 202 - 207
[47] Effects of grain-size distribution on effective anisotropy and coercivity for nanocrystalline hard magnetic material
Feng, WC
Gao, RW
Li, W
ACTA METALLURGICA SINICA, 2005, 41 (04) : 347 - 350
[48] Initial Irreversible Losses and Enhanced High-Temperature Performance of Rare-Earth Permanent Magnets
Xia, Wei
He, Yangkun
Huang, Houbing
Wang, Hui
Shi, Xiaoming
Zhang, Tianli
Liu, Jinghua
Stamenov, Plamen
Chen, Longqing
Coey, John Michael David
Jiang, Chengbao
ADVANCED FUNCTIONAL MATERIALS, 2019, 29 (24)
[49] Coercivity enhancement in Dy-free sintered Nd-Fe-B magnets by effective structure optimization of grain boundaries
Ding, Guangfei
Guo, Shuai
Chen, Ling
Di, Jinghui
Song, Jie
Chen, Renjie
Lee, Don
Yan, Aru
JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 735 : 795 - 801
[50] Effect of rare-earth ions on magnetic properties and spin excitations in manganites
Mukhin, AA
Ivanov, VY
Travkin, VD
Prokhorov, AS
Balbashov, AM
Hemberger, J
Loidl, A
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 : 96 - 97

← 1 2 3 4 5 →