期刊
JOURNAL OF APPLIED PHYSICS
卷 91, 期 10, 页码 6801-6805出版社
AMER INST PHYSICS
DOI: 10.1063/1.1446122
关键词
-
We report the detection of electromagnetic waves radiated by current-driven magnons in Co/Cu magnetic multilayers. The magnons were excited by means of a high current density similar to10(8) A/cm(2) injected into the multilayer through a point contact. The point contact itself was used as a high frequency mixer to mix electromagnetic waves radiated by the current-driven magnons with externally generated microwave radiation. Here the external microwaves are used as a direct probe of the high-frequency behavior and partial phase coherence of the current-induced excitations. When the external frequency equaled the frequency of the magnons generated in the multilayer a dc voltage was found to develop across the contact. Investigation of how this voltage varies with exciting current, magnetic field, and microwave frequency provides detailed information on the spectrum of the current-driven magnons. Our observations support the feasibility of a spin-wave maser, or spin-wave amplification by stimulated emission of radiation (SWASER). (C) 2002 American Institute of Physics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据