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Temperature dependence of shot noise in double barrier magnetic tunnel junctions
Physical Review B ( IF 3.7 ) Pub Date : 2018-03-20 00:00:00 , DOI: 10.1103/physrevb.97.104412
Jiasen Niu , Liang Liu , J. F. Feng , X. F. Han , J. M. D. Coey , X.-G. Zhang , Jian Wei

Shot noise reveals spin dependent transport properties in a magnetic tunnel junction. We report measurement of shot noise in CoFeB/MgO/CoFeB/MgO/CoFeB double barrier magnetic tunnel junctions, which shows a strong temperature dependence. The Fano factor used to characterize shot noise increases with decreasing temperature. A sequential tunneling model can be used to account for these results, in which a larger Fano factor results from larger spin relaxation length at lower temperatures.

中文翻译:

双势垒磁性隧道结中散粒噪声的温度依赖性

散粒噪声揭示了磁性隧道结中与自旋有关的传输特性。我们报告了在CoFeB / MgO / CoFeB / MgO / CoFeB双势垒磁性隧道结中散粒噪声的测量结果,这显示出强烈的温度依赖性。用于表征散粒噪声的Fano因子随温度降低而增加。顺序隧穿模型可用于解释这些结果,其中较大的Fano因子来自较低温度下较大的自旋弛豫长度。
更新日期:2018-03-20
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