自旋波信号的非互易放大

M. Bao, Kin L. Wong, A. Khitun, Kang L. Wang
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引用次数: 0

摘要

自旋波的研究越来越受到人们的关注,纳米移相器、逻辑门、自旋波母线等新型自旋波器件相继问世。为了充分实现自旋波的功能,特别是在级联信号处理中,一种能够直接放大自旋波信号的器件是必不可少的。提出了铁磁参量放大器——利用频率为信号频率两倍的泵浦波放大自旋波信号。到目前为止,其他小组报道的所有演示自旋波放大实验都使用了铁氧体绝缘材料[1]。在本文中,我们报道了一种导电金属薄膜的自旋波放大,以及一种新的磁性器件性质——自旋波信号的非倒数放大,尽管自旋波传播是倒数的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonreciprocal amplification of spin-wave signals
The research on spin wave is attracting more attentions and novel spin-wave based devices including nanometer size phase-shifter, logical gates, and spin-wave bus have been developed. In order to fully realize functions promised by spin waves, especially in cascaded signal processing, a device that can directly amplify spin-wave signal is indispensable. Ferromagnetic parametric amplifiers - amplifying spin-wave signals by pump waves whose frequencies are typically double of signal frequency, were proposed. So far, all demonstrated spin-wave amplification experiments reported by other groups have used ferrite insulating materials [1]. In this abstract, we report spin-wave amplification with a conducting metallic thin film as well as a new magnetic device property - nonreciprocal amplification of spin-wave signals even though the spin-wave propagation is reciprocal.
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