Abstract
Careful analysis of experimental data obtained from photo-induced ferromagnetic resonance (ph-FMR) for systems incorporating magnetic junctions shed light on spin dynamics associated with interface magnetism. Examples are grate field-dependent magnetic damping in a Fe/(Ga,Mn)As and enhanced precession amplitude in a Co/Pd multi-layered structure. In the former, we discuss a scenario of spin pumping induced by a domain wall across the interface. For the latter, we discuss a scenario of efficient energy transfer from orbital (electronic) to spin sub-systems at the Co/Pd interface. Those examples suggest importance of magnetic interfaces on ultrafast magnetic phenomena.
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References
S. Kobayashi, K. Suda, J. Aoyama, D. Nakahara, and H. Munekata, “Photo-Induced Precession of Magnetization in Metal/(Ga, Mn)As Systems” IEEE Trans. Mag. 46, 2470-2473 (2010).
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Acknowledgments
This work is supported in part by the Advanced Photon Science Alliance Project from MEXT, and Grand-in-Aid for Scientific Research No. 22226002 from JSPS.
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Munekata, H. (2015). Photo-induced Ferromagnetic Resonance in Systems Incorporating Magnetic Junctions. In: Bigot, JY., Hübner, W., Rasing, T., Chantrell, R. (eds) Ultrafast Magnetism I. Springer Proceedings in Physics, vol 159. Springer, Cham. https://doi.org/10.1007/978-3-319-07743-7_64
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DOI: https://doi.org/10.1007/978-3-319-07743-7_64
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