Analysis of magnetization processes in composite media grains
Analysis of magnetization processes in composite media grains
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DOI：
10.1063/1.2167635
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发表时间：
2006-04
影响因子：
3.2
通讯作者：
H. Richter;A. Dobin
中科院分区：
文献类型：
--
作者：
H. Richter;A. Dobin
复合晶粒，由一个亚晶粒与高各向异性场与一个亚晶粒与零各向异性耦合，使用双自旋模型进行了分析。给出了一个解析表达式的子晶粒之间的交换耦合，最大限度地减少所需的领域，以扭转的硬磁层。两个自旋模型的结果进行了比较与自旋链，代表了“交换弹簧磁铁”。指出了双自旋模型的局限性。
Composite grains, consisting of a subgrain with high anisotropy field coupled with a subgrain with zero anisotropy, are analyzed using a two-spin model. An analytical expression is given for the exchange coupling between the subgrains that minimizes the field required to reverse the magnetically hard layer. The results of the two-spin model are compared with those of a spin chain that represents an “exchange spring magnet.” The limitations of the two-spin model are worked out.