Picosecond inverse magnetostriction in galfenol thin films

Coherent high-amplitude precession of the magnetization and spin waves with frequencies up to 40 GHz are generated by injecting picosecond compressive and shear acoustic pulses into nanometer-sized galfenol (Fe81Ga19) films. The magnetization modulation is due to the picosecond inverse magnetostrict...

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Veröffentlicht in:Applied physics letters 2013-07, Vol.103 (3)
Hauptverfasser: Jäger, J. V., Scherbakov, A. V., Linnik, T. L., Yakovlev, D. R., Wang, M., Wadley, P., Holy, V., Cavill, S. A., Akimov, A. V., Rushforth, A. W., Bayer, M.
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container_issue 3
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container_title Applied physics letters
container_volume 103
creator Jäger, J. V.
Scherbakov, A. V.
Linnik, T. L.
Yakovlev, D. R.
Wang, M.
Wadley, P.
Holy, V.
Cavill, S. A.
Akimov, A. V.
Rushforth, A. W.
Bayer, M.
description Coherent high-amplitude precession of the magnetization and spin waves with frequencies up to 40 GHz are generated by injecting picosecond compressive and shear acoustic pulses into nanometer-sized galfenol (Fe81Ga19) films. The magnetization modulation is due to the picosecond inverse magnetostrictive effect. The oscillations of the magnetization measured by magneto-optical Kerr rotation last for several nanoseconds, and the maximum modulation of the in-plane effective magnetic field is as high as 40 mT. These results in combination with a comprehensive theoretical analysis show that galfenol films possess excellent properties for ultrafast magnetization control based on the picosecond inverse magnetostrictive effect.
doi_str_mv 10.1063/1.4816014
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title Picosecond inverse magnetostriction in galfenol thin films
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