arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0906.4566cond-mat.mtrl-scicond-mat.mes-hall
收藏

高自旋极化下自旋转移系统的反常稳定化

Anomalous stabilization in a spin-transfer system at high spin polarization

Inti Sodemann, Ya. B. Bazaliy

摘要:

在宏观自旋近似下,研究了纳米铁磁体在自旋转移矩驱动下的开关图。我们考虑一个圆盘形的自由层与平面内的易磁化轴和外部磁场在90度的平面内指向该轴。结果表明,这种配置是敏感的自旋转移效率因子的角度依赖性,并可用于实验区分不同形式的$g(θ)$,特别是原始Slonczewski形式和恒定的$g$近似之间。开关图的差异是特别明显的大自旋极化,与Slonczewski的情况下表现出异常区域。

英文摘要:

Switching diagrams of nanoscale ferromagnets driven by a spin-transfer torque are studied in the macrospin approximation. We consider a disk-shaped free layer with in-plane easy axis and external magnetic field directed in-plane at 90 degrees to that axis. It is shown that this configuration is sensitive to the angular dependence of the spin-transfer efficiency factor and can be used to experimentally distinguish between different forms of $g(θ)$, in particular between the original Slonczewski form and the constant $g$ approximation. The difference in switching diagrams is especially pronounced at large spin polarizations, with the Slonczewski case exhibiting an anomalous region.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑