Reversal mode instability and magnetoresistance in perpendicular (Co/Pd)/Cu/(Co/Ni) pseudo-spin-valves
Reversal mode instability and magnetoresistance in perpendicular (Co/Pd)/Cu/(Co/Ni) pseudo-spin-valves
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DOI：
10.1063/1.4813393
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发表时间：
2013-07-08
影响因子：
4
通讯作者：
Liu, Kai
中科院分区：
文献类型：
--
作者：
Davies, J. E.;Gilbert, D. A.;Liu, Kai
我们在垂直的（Co/Pd）（4）/Co/Cu/（Co/Ni）（4）/Co赝自旋阀中观察到了明显的温度依赖的磁化反转模式，这与自旋输运性质有关.在300 K时，垂直相关畴发生磁化反转。低于200 K的磁滞回线变得分叉，由于横向相关的反转的个别堆栈。磁位形的改变也导致更高的自旋无序和巨磁电阻效应的显著增加。一阶反转曲线的测量表明，耦合状态可以通过场循环重新建立，并允许直接确定作为温度的函数的层间耦合强度。(C)2013 AIP Publishing LLC.
We have observed distinct temperature-dependent magnetization reversal modes in a perpendicular (Co/Pd)(4)/Co/Cu/(Co/Ni)(4)/Co pseudo-spin-valve, which are correlated with spin-transport properties. At 300 K, magnetization reversal occurs by vertically correlated domains. Below 200 K the hysteresis loop becomes bifurcated due to laterally correlated reversal of the individual stacks. The magnetic configuration change also leads to higher spin disorders and a significant increase in the giant magnetoresistance effect. First order reversal curve measurements reveal that the coupled state can be re-established through field cycling and allow direct determination of the interlayer coupling strength as a function of temperature. (C) 2013 AIP Publishing LLC.