Zero-field spin torque oscillation in Co2(Fe, Mn)Si with a point contact geometry

Zero-field spin torque oscillation in Co2(Fe, Mn)Si with a point contact geometry
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具有点接触几何形状的 Co2(Fe, Mn)Si 中的零场自旋扭矩振荡

DOI:
10.1063/1.4914375
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发表时间:
2015
影响因子:
4
通讯作者:
K. Takanashi
K. Takanashi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Tokujirou Yamamoto;T. Seki;T. Kubota;H. Yako;K. Takanashi

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我们使用高自旋极化Co2Fe0.4Mn0.6Si (CFMS) Heusler合金的点接触巨磁阻器件,展示了零外磁场下的自旋力矩振荡。该器件在没有外部磁场的情况下发射具有3mhz窄谱线宽的高射频功率(Prf)信号。根据施加电流的不同,可以清楚地观察到模态变化,并且实现了25.7 nW的较大Prf。由于CFMS的高自旋极化特性和点接触几何结构的优势,使得其具有较大的Prf和较高的振荡相干性。
We show spin torque oscillation at zero external magnetic field using a point-contact giant magnetoresistance device with a highly spin-polarized Co2Fe0.4Mn0.6Si (CFMS) Heusler alloy. The device emitted a high rf power (Prf) signal with a narrow spectral linewidth of 3 MHz without external magnetic field. Depending on the applied current, mode changes were clearly observed, and a large Prf of 25.7 nW was achieved. The large Prf and the high coherency of oscillation are attributable to the combination of the high spin-polarization of CFMS and the advantages of point-contact geometry.
DOI: 10.1038/nmat3459
发表时间: 2012-12-01
期刊: NATURE MATERIALS
影响因子: 41.2
作者:
Demidov, Vladislav E.;Urazhdin, Sergei;Demokritov, Sergej O.
通讯作者: Demokritov, Sergej O.
DOI: 10.1063/1.3693391
发表时间: 2012-03-12
影响因子: 4
作者:
Sebastian, T.;Ohdaira, Y.;Hillebrands, B.
通讯作者: Hillebrands, B.