Acoustic ferromagnetic resonance and spin pumping induced by surface acoustic waves
- 11 March 2020
- journal article
- research article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 53 (26), 264002
- https://doi.org/10.1088/1361-6463/ab7efe
Abstract
Voltage induced magnetization dynamics of magnetic thin films is a valuable tool to study anisotropic fields, exchange couplings, magnetization damping, and spin pumping mechanism. A particularly well-established technique is the ferromagnetic resonance (FMR) generated by the coupling of microwave photons and magnetization eigenmodes in the GHz range. Here we review the basic concepts of the so-called acoustic ferromagnetic resonance technique (a-FMR) induced by the coupling of surface acoustic waves (SAW) and magnetization of thin films. Interestingly, additional to the benefits of the microwave excited FMR technique, the coupling between SAW and magnetization also offers fertile ground to study magnon-phonon and spin rotation couplings. We describe the in-plane magnetic field angle dependence of the a-FMR by measuring the absorption/transmission of SAW and the attenuation of SAW in the presence of rotational motion of the lattice, and show the consequent generation of spin current by acoustic spin pumping.Funding Information
- Japan Society for the Promotion of Science (Grants-in-Aid for Scientific Resear, KAKENHI (JP 19K21040), KAKENHI (No 17H02927 and No. 261030, KAKENHI (No. 19H05629), KAKENHI (No. JP19J21720))
- Exploratory Research for Advanced Technology
This publication has 23 references indexed in Scilit:
- Inverse Edelstein effect induced by magnon-phonon couplingPhysical Review B, 2018
- Spin Pumping and Inverse Spin Hall Effect in Platinum: The Essential Role of Spin-Memory Loss at Metallic InterfacesPhysical Review Letters, 2014
- Surface acoustic wave driven ferromagnetic resonance in nickel thin films: Theory and experimentPhysical Review B, 2012
- Resonant Nonlinear Damping of Quantized Spin Waves in Ferromagnetic Nanowires: A Spin Torque Ferromagnetic Resonance StudyPhysical Review Letters, 2009
- Study of the dynamic magnetic properties of soft CoFeB filmsJournal of Applied Physics, 2006
- Switching of magnetization by nonlinear resonance studied in single nanoparticlesNature Materials, 2003
- Surface acoustic attenuation due to surface spin wave in ferro- and antiferromagnetsAIP Conference Proceedings, 1976
- Interaction of Spin Waves and Ultrasonic Waves in Ferromagnetic CrystalsPhysical Review B, 1958
- On the Theory of Ferromagnetic Resonance AbsorptionPhysical Review B, 1948
- Interpretation of Anomalous Larmor Frequencies in Ferromagnetic Resonance ExperimentPhysical Review B, 1947