Spin-Dependent Local Transport Properties in Ferromagnetic Tunnel Junction.
Spin-Dependent Local Transport Properties in Ferromagnetic Tunnel Junction.
复制标题
铁磁隧道结中自旋相关的局部输运特性。
DOI：
10.3379/jmsjmag.25.759
复制
发表时间：
2001
影响因子：
--
通讯作者：
T. Miyazaki
中科院分区：
文献类型：
--
作者：
M. Hayashi;Y. Ando;H. Kubota;T. Miyazaki
使用接触模式原子力显微镜（AFM）测量铁磁隧道结的局部电特性。电流图像反映了通过局部 I-V 曲线测量确定的势垒高度分布。TMR 比率是根据电流直方图估计的。该估计值非常符合 TMR 比率的实验温度依赖性。结果表明，TMR 比随着势垒高度分布偏差的减小和平均势垒高度的增加而增加。还讨论了具有低势垒高度的局部电流沟道对 TMR 比的影响。
The local electrical properties in ferromagnetic tunnel junctions was measured using contact-mode Atomic Force Microscopy (AFM). The electrical current images reflected the barrier height distribution determined by local I-V curve measurement The TMR ratio was estimated from the current histogram. The estimation closely fitted the experimental temperature dependence of TMR ratio. The TMR ratio was shown to increase with a decrease in the deviation of barrier height distribution and with an increase in average barrier height The effect of the local current channel with low barrier height on the TMR ratio is also discussed.