A model for the field dependence of magnetization discontinuities in high-anisotropy materials
A model for the field dependence of magnetization discontinuities in high-anisotropy materials
复制标题
高各向异性材料中磁化不连续性的场依赖性模型
DOI：
10.1109/tmag.1973.1067693
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发表时间：
1973
影响因子：
2.1
通讯作者：
J. Becker
中科院分区：
文献类型：
--
作者：
J. Becker
涉及两种类型的原子核的简单模型，既不具有任何不寻常或不对称的特性，也可以描述与粉末中矫顽力的场依赖性和高各向异性材料（包括正铁氧体和六方氧化物以及钴稀土）的单个颗粒中的成核场相关的多种现象。一种类型的核是畴壁陷阱，它通过捕获移动壁的碎片来激活。另一种类型是通过与局部磁化强度相互作用提供反转位点的任何局部扰动。它们一起允许对已观察到的多种类型的行为进行合理的定量预测。
A simple model involving two types of nuclei, neither with any unusual or unsymmetrical properties, can describe a large variety of phenomena related to the field dependence of coercive force in powders and nucleating fields in single particles of high-anisotropy materials, including orthoferrites and hexagonal oxides as well as cobalt-rare-earths. One type of nucleus is a domain wall trap that is activated by capturing a fragment of moving wall. The other type is any local disturbance that provides a reversal site by its interaction with the local magnetization. Together they permit reasonable quantitative predictions of a number of types of behavior that have been observed.