Magnetic structure determination for Nd90-xFexAl10 glassy hard magnets using RMC modelling of neutron diffraction data

被引：9

作者：

Lupu, N

McGreevy, RL

Chiriac, H

机构：

[1] Natl Inst Res & Dev Tech Phys, RO-700050 Iasi, Romania

[2] Uppsala Univ, Studsvik Neutron Res Lab, S-61182 Nykoping, Sweden

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2004年 / 375卷

关键词：

bulk amorphous alloys; hard magnets; coercivity-thickness dependence; magnetic clusters; reverse Monte Carlo method;

D O I：

10.1016/j.msea.2003.10.110

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Considering experimental magnetic results and local magnetic structures, simulated by the reverse Monte Carlo method using neutron diffraction data, we propose that the microstructure of the Nd-Fe-Al glassy alloys, which is intimately related to their magnetism, consists of small clusters or medium-range ordered regions of 2-3 nm, embedded in an amorphous matrix. The distribution of the clusters is more homogeneous in thick samples, leading to a higher magnetic percolation limit and an increase of the coercive field from I to 2T for thin samples 25 mum in thickness to 7-8 T for thick samples 2 mm in diameter. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：1105 / 1109

页数：5

共 17 条

[1] MAGNETIZATION AND NEUTRON-SCATTERING MEASUREMENTS ON AMORPHOUS NDFE2 [J].