An analytic study on coercivity mechanism of exchange coupled Nd2Fe14B/α-Fe nanocomposite magnets

被引：6
作者：
Ryo, Hyok-Su [1 ]
Kim, Kyong-Gi [2 ]
Kim, Yong-Jun [2 ]
机构：
[1] Kim II Sung Univ, Fac Phys, Pyongyang, North Korea
[2] Kim Chaek Univ Technol, Fac Phys Engn, Pyongyang, North Korea
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2019年 / 469卷
关键词：
Coercivity mechanism; Exchange coupled magnets; Nd2Fe14B/alpha-Fe magnets; Domain wall energy; Grain boundary; ND-FE-B; PERMANENT-MAGNETS; SINTERED MAGNETS; MICROSTRUCTURE; ENHANCEMENT; NUCLEATION; SIMULATION; ALLOYS; GRAIN;
D O I：
10.1016/j.jmmm.2018.09.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, a coercivity mechanism has been suggested for exchange coupled soft/hard nanocomposite magnets to estimate the coercive field from maximum domain wall energy gradient at the soft/hard phase grain boundary. A derivable function gamma(x) has been suggested near the soft/hard grain boundary to reflect detailed microstructures (e.g. grain sizes of hard and soft phases) and the coercivity has been expressed by the first derivative d gamma(x)/dx. Using the model, for exchange coupled Nd2Fe14B/alpha-Fe nanocomposite multilayer systems, relation between the coercivity and alpha-Fe layer thickness has been estimated and analyzed by comparing with the results from prior experimental and micromagnetic studies.
引用
收藏
页码：531 / 534
页数：4
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