Individual atomic-scale magnets interacting with spin-polarized field-emitted electrons.
Individual atomic-scale magnets interacting with spin-polarized field-emitted electrons.
复制标题
单个原子级磁体与自旋极化场发射电子相互作用
DOI：
10.1103/physrevlett.109.097602
复制
发表时间：
2012
影响因子：
8.6
通讯作者：
R. Wiesendanger
中科院分区：
文献类型：
--
作者：
A. Schlenhoff;A. Sonntag;J. Hermenau;J. Friedlein;S. Krause;R. Wiesendanger
我们在热开关纳米磁体中共振注入自旋极化场发射电子。作为自旋极化发射电流的函数的详细的寿命分析表明，产生相当大的焦耳加热，和自旋转移扭矩的结果在一个定向切换。随着发射电流的增加，观察到每个电子的开关效率更高的趋势，这可能是由于斯通纳模式的激发。在准稳态纳米磁体上，低nA制度中的自旋极化发射电流已经触发磁化反转，从而证明热电子自旋对原子尺度磁体的高影响。
We resonantly inject spin-polarized field-emitted electrons in thermally switching nanomagnets. A detailed lifetime analysis as a function of the spin-polarized emission current reveals that considerable Joule heating is generated, and spin-transfer torque results in a directed switching. A trend of higher switching efficiency per electron is observed with an increasing emission current, probably due to the excitation of Stoner modes. On a quasistable nanomagnet, a spin-polarized emission current in the low nA regime already triggers magnetization reversal, thereby demonstrating the high impact of hot-electron spins onto atomic-scale magnets.