Interlayer exchange coupling in [Pt/Co]n/MgO/[Co/Pt]2 perpendicular magnetic tunnel junctions
Interlayer exchange coupling in [Pt/Co]n/MgO/[Co/Pt]2 perpendicular magnetic tunnel junctions
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DOI：
10.1063/1.4896186
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发表时间：
2014-09-28
影响因子：
3.2
通讯作者：
Hou, Hongmiao
中科院分区：
文献类型：
--
作者：
Li, Lei;Han, Dong;Hou, Hongmiao
本文对[Pt/Co](n)/MgO/[Co/Pt](2)垂直磁隧道结的层间交换耦合进行了进一步的研究。在[Pt/Co](n)/MgO/[Co/Pt](2)中观察到反铁磁层间耦合。反铁磁耦合强度随重复次数n发生不规则振荡，这可能与[Pt/Co](n)硬层中存在Ruderman-Kittel-Kasuya-Yosida （RKKY）型铁磁层间耦合有关。[Pt/Co](9)/MgO（22埃）/[Co/Pt](2)磁隧道结层间耦合在200K时达到最大值，随着温度的升高逐渐降低。层间耦合的这种热行为可能与硬层垂直磁各向异性随温度降低而增强有关。(C) 2014 AIP出版有限责任公司
In this paper, we present further study on the interlayer exchange coupling of [Pt/Co](n)/MgO/[Co/Pt](2) perpendicular magnetic tunnel junctions. Antiferromagnetic interlayer couplings in [Pt/Co](n)/MgO/[Co/Pt](2) are observed. The strength of antiferromagnetic coupling oscillates irregularly with the repetition number n, that may be related to the Ruderman-Kittel-Kasuya-Yosida (RKKY)-type ferromagnetic interlayer coupling existing in the [Pt/Co](n) hard layer. The interlayer coupling of [Pt/Co](9)/MgO(22 angstrom)/[Co/Pt](2) magnetic tunnel junction reaches a maximum at 200K, and decreases gradually with increasing temperature. This thermal behavior of interlayer coupling may be related to the enhanced perpendicular magnetic anisotropy of hard layer with decreasing temperature. (C) 2014 AIP Publishing LLC.