Chemical states of Co and Fe in a specularly reflective oxide layer in spin valves
Chemical states of Co and Fe in a specularly reflective oxide layer in spin valves
复制标题
自旋阀镜面反射氧化物层中 Co 和 Fe 的化学状态
DOI：
10.1063/1.1632024
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
J. Suh
中科院分区：
文献类型：
--
作者：
Jongill Hong;Young;Min Kyu Lee;H. Song;H. Shin;Y. Yoo;J. Suh
在检查的近边缘的X射线吸收精细结构谱和磁电阻响应的自旋阀与部分氧化的Co 90 Fe 10层，我们发现，氧优先与溶质Fe而不是与溶剂Co反应，和非常氧化的Fe可能会增强镜面反射，导致磁电阻值的增加。退火后，Fe氧化物转变为α-Fe 2 O3，进一步提高了自旋阀的磁电阻响应。研究结果表明，获得合适的氧化物相并控制其数量是优化镜面反射氧化层自旋阀磁电阻性能和磁性能的关键。
In an examination of near-edge x-ray absorption fine structure spectra and magnetoresistance responses of a spin valve with a partially oxidized Co90Fe10 layer, we found that oxygen preferentially reacted with the solute Fe rather than with the solvent Co, and the very oxidized Fe likely enhanced specular reflections leading to an increase in the magnetoresistance value. Most Fe oxides transformed into α-Fe2O3, which further improved the magnetoresistance response after the spin valves were annealed. Our results show that obtaining appropriate oxide phases and controlling their quantity are the key to optimizing the magnetoresistance performance and magnetic properties of spin valves with specularly reflective oxide layers.