期刊
SOLID STATE COMMUNICATIONS
卷 198, 期 -, 页码 35-39出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2013.10.007
关键词
Ferromagnets; Ultrasound; Magnetoelastic coupling; Spin pumping
资金
- FOM Foundation
- Marie Curie ITN Spinicur
- Reimei program of the Japan Atomic Energy Agency
- EU-ICT-7 MACALO
- ICC-IMR, DFG Priority Programme 1538 Spin-Caloric Transport
- [25247056]
- Grants-in-Aid for Scientific Research [26103006, 25247056] Funding Source: KAKEN
We study propagation of ultrasonic waves through a ferromagnetic medium with special attention to the boundary conditions at the interface with an ultrasonic actuator. In analogy to charge and spin transport in conductors, we formulate the energy transport through the system as a scattering problem. We find that the magneto-elastic coupling leads to a non-vanishing magnetic (elastic) energy accompanying the acoustic (spin) waves with a resonantly enhanced effect around the anti-crossing in the dispersion relations. We demonstrate the physics of excitating magnetization dynamics via acoustic waves injected around the ferromagnetic resonance frequency. (C) 2013 Elsevier Ltd. All rights reserved.
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