ABSTRACT

Although coercivity is one of the fundamental properties of permanent magnets, it has not been well understood. In this paper, micromagnetics and thermal activation magnetization reversal theories are briefly reviewed, and then our recent macroscopic and microscopic experimental approaches for thermally activated magnetization reversal in advanced Nd-Fe-B hot-deformed magnets are explained. Our experimental results are well supported by the recent atomistic spin model calculations. Moreover, the systematic micromagnetics simulation study makes much clearer the physical picture of the thermally activated magnetization reversal process in permanent magnets.

中文翻译：

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先进永磁材料微磁矫顽力分析的实验方法

摘要

尽管矫顽力是永磁体的基本特性之一，但尚未得到很好的理解。在本文中，简要回顾了微磁学和热活化磁化反转理论，然后说明了我们最近的先进Nd-Fe-B热变形磁体中热活化磁化反转的宏观和微观实验方法。最近的原子自旋模型计算为我们的实验结果提供了有力的支持。此外，系统的微磁模拟研究使永磁体中热激活的磁化反转过程的物理图像更加清晰。