Microwave generation by spin Hall nanooscillators with nanopatterned spin injector

被引：13
|
作者：
Zholud, A. [1 ]
Urazhdin, S. [1 ]
机构：
[1] Emory Univ, Dept Phys, Atlanta, GA 30322 USA
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 11期
基金：
美国国家科学基金会;
关键词：
MAGNETIC-FIELD;
D O I：
10.1063/1.4896023
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We experimentally study spin Hall nano-oscillators based on Pt/ferromagnet bilayers with nanopatterned Pt spin injection layer. We demonstrate that both the spectral characteristics and the electrical current requirements can be simultaneously improved by reducing the spin injection area. Moreover, devices with nanopatterned Pt spin injector exhibit microwave generation over a wide temperature range that extends to room temperature. Studies of devices with additional Pt spacers under the device electrodes show that the oscillation characteristics are affected not only by the spin injection geometry but also by the effects of Pt/ferromagnet interface on the dynamical properties of the ferromagnet. (c) 2014 AIP Publishing LLC.
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