Perpendicular giant magnetoresistance of Co91Fe9/Cu exchange-biased spin-valves: further evidence for a unified picture
Perpendicular giant magnetoresistance of Co91Fe9/Cu exchange-biased spin-valves: further evidence for a unified picture
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Co91Fe9/Cu交换偏置自旋阀的垂直巨磁阻：统一图片的进一步证据
DOI：
10.1016/s0304-8853(99)00046-3
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发表时间：
1999
影响因子：
2.7
通讯作者：
J. Bass
中科院分区：
文献类型：
--
作者：
A. Reilly;W. Park;R. Slater;B. Ouaglal;R. Loloee;W. Pratt;J. Bass
在垂直于Co91Fe9和Cu的交换偏置自旋阀(EBSV)的电流方向上，随着Co91Fe9层厚度的增加，测量得到了比电阻AΔR的增加。分析得到了Co91Fe9的自旋各向异性参数β=0.6 5±0.0 5，自旋扩散长度lCoFesf=12±1 nm。β的值与稀CoFe合金的实验值和理论值符合得很好，从而为CPP-MR和块体合金中自旋极化输运的统一图景提供了额外的支持。LCoFesf的这个值，以及之前确定的坡莫合金的lPysf值，与这两种合金的残余电阻率大致成反比。
Measurements are reported of the increase in specific resistance, AΔR, with increasing Co91Fe9layer thickness in current-perpendicular to the plane (CPP) exchange-biased spin-valves (EBSVs) of Co91Fe9and Cu. Analysis of these measurements yields a spin anisotropy parameter for Co91Fe9of β=0.65±0.05, and a spin diffusion length of lCoFesf=12±1nm. The value of β agrees reasonably well with those obtained experimentally and theoretically for dilute CoFe alloys, thus providing additional support for a unified picture of spin-polarized transport in CPP-MR and bulk alloys. This value of lCoFesf, and the previously determined lPysffor Permalloy, scale approximately inversely with the residual resistivities of the two alloys.