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Nonreciprocal amplification of spin-wave signals

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4 Author(s)
Mingqiang Bao ; Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA ; Wong, Kin ; Khitun, A. ; Wang, K.L.

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. 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 spinwave propagation is reciprocal.

Published in:

Device Research Conference (DRC), 2010

Date of Conference:

21-23 June 2010