In-situ high-temperature domain structures of die-upset Nd-Fe-B magnets

SCRIPTA MATERIALIA

卷:111

Article

Fang, Yikun^1,2,3  Yin, Xiaolu^1,2  Skomski, Ralph^1,2  Cheng, Hongsheng³  Song, Kuikui³  Zhu, Minggang³  Guo, Zhaohui³  Li, Wei³  Liou, Sy-Hwang^1,2 

[1] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[2] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

[3] Cent Iron & Steel Res Inst, Div Funct Mat Res, Beijing 100081, Peoples R China

关键词: Die-upset Nd-Fe-B magnets;    Magnetic force microscopy (MFM);    Magnetic domains;   

DOI  :  10.1016/j.scriptamat.2015.08.017

来源: Elsevier

【 摘 要 】

Magnetic domains of a die-upset Nd-Fe-B magnet with an energy product of about 50 MGOe are investigated by using in-situ magnetic force microscopy (MFM), varying temperature from room temperature to 240 degrees C. For both as-prepared and magnetized Nd-Fe-B samples, the domain-pattern evolution during thermal demagnetization is monitored by MFM. The temperature dependence of the evolution of reverse domains is explained by micromagnetic models. At all temperatures, the magnetization reversal in the technological relevant magnetized limit proceeds by nucleation. (c) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free