Magnetization reversal in cobalt antidot arrays
Magnetization reversal in cobalt antidot arrays
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DOI：
10.1103/physrevb.73.214429
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发表时间：
2006-06-01
影响因子：
3.7
通讯作者：
Fischer, P
中科院分区：
文献类型：
--
作者：
Heyderman, LJ;Nolting, F;Fischer, P
我们已经进行了详细的研究，在正方形晶格钴antidot阵列的周期范围从2 μ m到200 nm（antidot大小=antidot分离）的磁开关。磁光克尔效应的测量结果表明，第一个小的变化，由于在antidot行的磁自旋的可逆旋转的磁化，随后由一个大的变化，由于反转的antidot阵列列平行于所施加的领域。采用X射线光电子显微镜和透射X射线显微镜，后者的不可逆过程中观察到的离散域链的成核和传播。传播链端被阻止通过微磁模拟揭示的各种机制通过反点行中存在的垂直链。
We have carried out a detailed study of the magnetic switching in square lattice cobalt antidot arrays with periods ranging from 2 mu m down to 200 nm (antidot size=antidot separation). Magneto-optical Kerr effect measurements show first a small change in the magnetization due to a reversible rotation of the magnetic spins in the antidot rows, followed by a large change due to reversal of the antidot array columns parallel to the applied field. Employing x-ray photoemission electron microscopy and transmission x-ray microscopy, the latter irreversible process was observed as a nucleation and propagation of discrete domain chains. The propagating chain ends are blocked by perpendicular chains present in the antidot rows via various mechanisms revealed by micromagnetic simulations.