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) |
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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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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.</creator><creatorcontrib>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.</creatorcontrib><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. 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title | Picosecond inverse magnetostriction in galfenol thin films |
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