On the coupling between the domain wall coercivity and susceptibility
On the coupling between the domain wall coercivity and susceptibility
复制标题
磁畴壁矫顽力与磁化率的耦合
DOI：
10.1016/0304-8853(95)00098-4
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发表时间：
1995
影响因子：
2.7
通讯作者：
K. Metlov
中科院分区：
文献类型：
--
作者：
I. Tomáš;G. Vértesy;K. Metlov
畴壁矫顽场的实验值不仅与样品的磁性参数和材料缺陷有关，而且还受到样品中电流畴结构的强烈影响。研究畴壁的整体条件（通过有效场梯度和/或畴结构微分磁化率表示的畴壁位置恢复力）是描述这种影响的适当关键。只要有可能将具有不同磁化率值的畴结构引入到同一样品中（例如，通过调节样品历史或通过当前施加的场），就可以修改实际的畴壁矫顽场值。基于以前发表的理论和协议，在外延磁性石榴石薄膜的实验中，大致呈线性比例的畴壁矫顽场和样品畴结构磁化率的倒数值之间表现出。本文提出了用静磁法控制软磁材料畴壁矫顽场和磁滞损耗的方法，并进行了实验。
The experimental value of the domain wall coercive field does not depend on magnetic parameters and material defects only, but it is also strongly influenced by the current domain configuration in the sample. The investigation of the global conditions of the domain walls (the wall position restoring forces expressed through the effective field gradients and/or the domain structure differential susceptibility) is the proper key to the description of this influence. As far as it is possible to introduce domain structures with different values of susceptibility into the same sample (e.g. by conditioning the sample history or by currently applied fields), that far the actual domain wall coercive field value can be modified. Based on a previously published theory and in agreement with the presented experiments in epitaxial magnetic garnet films, a roughly linear proportionality is exhibited between the domain wall coercive field and the reciprocal value of the sample domain structure susceptibility. The way of a magnetostatic control of the domain wall coercive field and hysteresis losses in soft magnetic materials is suggested and tested.