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Journal Article

Non-reciprocal Pumping of Surface Acoustic Waves by Spin Wave Resonance


Yu,  T.
Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Yamamoto, K., Yu, W., Yu, T., Puebla, J., Xu, M., Maekawa, S., et al. (2020). Non-reciprocal Pumping of Surface Acoustic Waves by Spin Wave Resonance. Journal of the Physical Society of Japan, 89(11): 113702. doi:10.7566/JPSJ.89.113702.

Cite as: http://hdl.handle.net/21.11116/0000-0007-2BF7-3
We predict that surface acoustic waves are generated preferentially in one direction in a heterostructure of a thin magnetic film on a non-magnetic substrate. The non-reciprocity arises from magneto-elastic coupling and magneto-rotation coupling, the former being dominant for YIG/GGG heterostructures. For YIG films thinner than about 100 nm, the surface acoustic wave amplitude is nearly unidirectional at certain angles of the in-plane equilibrium magnetisation. We compute the full magnetic field dependence of the effect for a selected device.