Effective dipolar boundary conditions for dynamic magnetization in thin magnetic stripes
Effective dipolar boundary conditions for dynamic magnetization in thin magnetic stripes
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DOI：
10.1103/physrevb.66.132402
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发表时间：
2002-10-01
影响因子：
3.7
通讯作者：
Slavin, AN
中科院分区：
文献类型：
--
作者：
Guslienko, KY;Demokritov, SO;Slavin, AN
我们表明，动态磁化在一个薄的，轴向磁化的磁性元件的横向边缘有限的面内尺寸可以描述有效的“钉扎”边界条件。这种有效的钉扎是纯偶极性质的，与磁性材料的磁晶表面各向异性无关，并且由元件边缘附近的动态退磁场的不均匀性决定。使用这些有效的边界条件得到的本征函数和本征值给出定量描述的量子化自旋波谱实验观察到的长而薄的坡莫合金条纹的微米尺寸的宽度。
We show that dynamic magnetization at the lateral edges of a thin, axially magnetized magnetic element with finite in-plane size can be described by effective "pinning" boundary conditions. This effective pinning is of a purely dipolar nature, is not related to the magnetocrystalline surface anisotropy of the magnetic material, and is determined by the inhomogeneity of the dynamic demagnetizing field near the edges of the element. Eigenfunctions and eigenvalues obtained using these effective boundary conditions give quantitative description of the quantized spin wave spectra experimentally observed in long and thin permalloy stripes of a micron-size width.