Micromagnetic study of Nd2Fe14B/α-Fe and Nd2Fe14B/Fe3B nanocomposite magnets

被引：9
作者：
Ji, C [1 ]
Yang, J [1 ]
Mao, W [1 ]
Yang, Y [1 ]
机构：
[1] Beijing Univ, Dept Phys, Magnetism Lab, Beijing 100871, Peoples R China
来源：
SOLID STATE COMMUNICATIONS | 1999年 / 111卷 / 02期
基金：
中国国家自然科学基金;
关键词：
magnetically ordered materials; chemical synthesis;
D O I：
10.1016/S0038-1098(99)00159-3
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The remanence enhancement, phase fractions, and coercivity mechanism of Nd2Fe14B/alpha-Fe and Nd2Fe14B/Fe3B nanocomposite magnets were studied using the micromagnetic theory. It was found that magnetocrystalline anisotropy energy density K, together with saturation magnetization M-s of the soft magnetic phase, plays a key role in the actual value of coercive fields for both Nd2Fe14B/alpha-Fe and Nd2Fe14B/Fe3B nanocomposite magnets. The differences between magnetic properties of Nd2Fe14B/alpha-Fe and Nd2Fe14B/Fe3B were successfully explained. Theoretical results support the experimental values. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：113 / 117
页数：5
相关论文
共 30 条
[1]   The effect of boron and rare earth contents on the magnetic properties of La and Cr substituted α-Fe/R2Fe14B-type nanocomposites [J].
Chang, WC ;
Chiou, DY ;
Wu, SH ;
Ma, BM ;
Chen, Q ;
Bounds, CO .
JOURNAL OF APPLIED PHYSICS, 1998, 83 (11) :6271-6273
[2]   MAGNETISM, PHASE-COMPOSITION, AND HYPERFINE FIELDS OF MELT-SPUN ND-FE-B ALLOYS WITH A A FEW PERCENT OF NEODYMIUM [J].
CHENG, ZH ;
SHEN, BG ;
MAO, MX ;
SUN, JJ ;
ZHANG, YD ;
LI, FS .
PHYSICAL REVIEW B, 1995, 52 (13) :9427-9436
[3]   MELTSPUN PERMANENT-MAGNET MATERIALS CONTAINING FE3B AS THE MAIN PHASE [J].
COEHOORN, R ;
DEMOOIJ, DB ;
DEWAARD, C .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1989, 80 (01) :101-104
[4]  
COEY JMD, 1995, P 3 INT S PHYS MAGN, P633
[5]   Nanocrystalline exchange-enhanced hard magnetic alloys [J].
Davies, HA .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 157 :11-14
[6]   On the role of dipolar coupling in the magnetization reversal process in hard-soft nanocomposite magnets [J].
Emura, M ;
Gonzalez, JM ;
Missell, FP .
IEEE TRANSACTIONS ON MAGNETICS, 1997, 33 (05) :3892-3894
[7]  
GONG W, 1994, J APPL PHYS, V75, P6649
[8]   R2FE14B MATERIALS - INTRINSIC-PROPERTIES AND TECHNOLOGICAL ASPECTS [J].
HERBST, JF .
REVIEWS OF MODERN PHYSICS, 1991, 63 (04) :819-898
[9]   Nanocrystallization reactions in the fabrication of Fe14Nd2B+Fe hard-soft magnets [J].
Hopfinger, T ;
Yavari, AR ;
Negri, D ;
Alonso, J ;
Hernando, A .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 164 (1-2) :L7-L12
[10]   THE EXCHANGE-SPRING MAGNET - A NEW MATERIAL PRINCIPLE FOR PERMANENT-MAGNETS [J].
KNELLER, EF ;
HAWIG, R .
IEEE TRANSACTIONS ON MAGNETICS, 1991, 27 (04) :3588-3600
123