Magnetization reversal in CoPt-based hard-soft homocomposites
Magnetization reversal in CoPt-based hard-soft homocomposites
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DOI：
10.1016/j.jmmm.2007.10.017
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发表时间：
2008-03-01
影响因子：
2.7
通讯作者：
Panagiotopoulos, I.
中科院分区：
文献类型：
--
作者：
Alexandrakis, V.;Niarchos, D.;Panagiotopoulos, I.
通过对底层进行适当热处理，制备了具有（11 11）织构的copt基硬-软溅射双层膜。比较了两种硬质层化学有序度不同的样品。硬层的各向异性决定了其抗软层失稳的鲁棒性。提出了软层磁滞回线特征随硬层磁态变化的详细测量方法，作为研究界面交换相互作用性质和磁化反转机理的手段。当硬层各向异性不够坚固时，反向软层会引起界面处磁结构的不可逆变化，导致交换场与硬层磁态的解耦。(C) 2007 Elsevier B.V.版权所有
CoPt-based hard-soft sputtered bilayers with (1 1 1) texture have been produced by appropriate heat treatment of the bottom layer. Two samples with different degrees of chemical ordering of the hard layer are compared. The anisotropy of the hard layer determines its robustness against destabilization from the soft one. Detailed measurements of the soft layer minor hysteresis loop features as a function of the magnetic state of the hard layer are proposed as a means to study the nature of interfacial exchange interactions and the mechanism of magnetization reversal. When hard layer anisotropy is not robust enough, the reversed soft layer can induce irreversible changes to the magnetic structure at the interface leading to a decoupling of exchange field from the magnetic state of the hard layer. (C) 2007 Elsevier B.V. All rights reserved.