Charge pumping in magnetic tunnel junctions: Scattering theory
Charge pumping in magnetic tunnel junctions: Scattering theory
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DOI：
10.1103/physrevb.77.180407
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发表时间：
2008-05-01
影响因子：
3.7
通讯作者：
Brataas, Arne
中科院分区：
文献类型：
--
作者：
Xiao, Jiang;Bauer, Gerrit E. W.;Brataas, Arne
我们从理论上研究了通过外延FIF和FNIF磁性隧道结（F，铁磁体; I，绝缘体; N，正常金属）的磁化动力学泵浦的电荷输运。我们预测一个小的，但可测量的直流泵浦电压在铁磁共振条件下共线磁化配置，这可能会改变作为势垒参数的函数的符号。当磁化成直角时，预期交流泵浦电压大得多。量子尺寸效应预测的FNIF结构作为正常层厚度的函数。
We study theoretically the charge transport pumped by magnetization dynamics through epitaxial FIF and FNIF magnetic tunnel junctions (F, ferromagnet; I, insulator; N, normal metal). We predict a small but measurable dc pumping voltage under ferromagnetic resonance conditions for collinear magnetization configurations, which may change sign as a function of barrier parameters. A much larger ac pumping voltage is expected when the magnetizations are at right angles. Quantum size effects are predicted for an FNIF structure as a function of the normal layer thickness.