Investigation of structure and magnetization reversal in mechanically alloyed SmCo6.8Zr0.2 magnets

被引：19

作者：

Liu, Z. ^{[1
]}

Chen, R. J. ^{[1
]}

Lee, D. ^{[1
]}

Yan, A. R. ^{[1
]}

机构：

[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Key Lab Magnet Mat & Devices, Ningbo 315201, Zhejiang, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 09期

关键词：

SmCo; Nanocrystalline magnetic materials; Inter-grain exchange coupling; Magnetization reversal; Irreversible nucleation field; CU; NANOCRYSTALLINE; COERCIVITY; FE; TI;

D O I：

10.1016/j.jallcom.2010.12.192

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nanocrystalline SmCo6.8Zr0.2 permanent magnets are prepared by intensive milling and subsequent annealing. XRD patterns of the samples annealed at 600 degrees C and 700 degrees C show a single SmCo7 phase with TbCu7 structure, while the SmCo7 phase decomposes into a mixture of Sm2Co17 and Co23Zr6 phase at higher annealing temperatures. The highest coercivity and energy product of about 2.06 T and 9.5MGOe are obtained in the sample annealed at 700 degrees C for 10 min. Further analysis reveals that a very strong inter-grain exchange coupling is observed in samples annealed at 700 degrees C for 3 (SZ-3) and 10 (SZ-10) min, indicating by the high remanence ratio and positive delta m in henkel-plot. It was supposed that the magnetization reversal process is controlled by domain wall pinning. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：3967 / 3971

页数：5

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