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arXiv · 1605.04058

Nonreciprocal propagation of surface acoustic wave in Ni/LiNbO3

R. Sasaki·Y. Nii·Y. Iguchi·Y. Onose
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Abstract

We have investigated surface acoustic wave propagation in Ni/LiNbO$_3$ hybrid devices. We have found the absorption and phase velocity are dependent on the sign of wave vector in a device, which indicates the nonreciprocal propagation characteristic of systems with time reversal and spatial inversion simultaneously broken symmetries. The nonreciprocity is reversed by the 180$^\circ$ rotation of magnetic field. Nonreciprocity seems largely dependent on the shape of ferromagnetic Ni film. The origin of these observations is ascribed to film shape dependent magnetoelastic coupling.

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R. Sasaki, Y. Nii, Y. Iguchi, Y. Onose. 2016-05-13. Nonreciprocal propagation of surface acoustic wave in Ni/LiNbO3. https://doi.org/10.1103/physrevb.95.020407

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