Interlayer magnetostatic coupling induced Co layer coercivity enhancement and exchange bias in [Pd/Co]/Cu/Co spin valves
Interlayer magnetostatic coupling induced Co layer coercivity enhancement and exchange bias in [Pd/Co]/Cu/Co spin valves
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DOI：
10.1063/1.3257696
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发表时间：
2009-10
影响因子：
4
通讯作者：
P. Yang;X. Y. Zhu;F. Zeng;F. Pan
中科院分区：
文献类型：
--
作者：
P. Yang;X. Y. Zhu;F. Zeng;F. Pan
研究了混合垂直/Cu/面内磁各向异性[Pd/Co]/Cu/Co单自旋阀和[Pd/Co]/Cu/Co/Cu/[Co/Pd]双自旋阀的层间杂散场耦合。Co层的磁化率的增强后，观察到交流或直流退磁的样品。这种效应来源于Co/Pd条带畴的面内杂散场对Co畴壁的钉扎，并且随着Co/Pd畴尺寸的减小，这种增强更有效。此外，净面内Co/Pd磁矩和Co磁矩之间的静磁相互作用导致双自旋阀的Co层中的交换偏置后的直流退磁。
Interlayer stray field coupling in hybrid perpendicular/Cu/in-plane magnetic anisotropy [Pd/Co]/Cu/Co single spin valves and [Pd/Co]/Cu/Co/Cu/[Co/Pd] dual spin valves was investigated. Enhancements of Co layer coercivity were observed after ac or dc demagnetization of the samples. This effect originates from the pinning of Co domain walls by the in-plane stray field from Co/Pd stripe domains, and the enhancements are more efficient as the Co/Pd domain size decreases. Moreover, the magnetostatic interaction between the net in-plane Co/Pd remanent moments and the Co moments leads to exchange bias in the Co layer of the dual spin valve after the dc demagnetization.