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Phys. Rev. B 65, 012413 (2001) [4 pages]

Fast magnetization reversal of GdFeCo induced by femtosecond laser pulses

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J. Hohlfeld, Th. Gerrits, M. Bilderbeek, and Th. Rasing
Research Institute for Materials, University of Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands

H. Awano and N. Ohta
Tsukuba Research Laboratory, Hitachi Maxell Ltd., 6-20-1 Kinunodai, Yawara, Tsukuba-gun, 300-2496 Japan

Received 13 June 2001; published 5 December 2001

Pump-pulse induced magnetization reversal of amorphous Gd23.1Fe71.9Co5.0 showed a subpicosecond magnetization collapse followed by a slower reversal. The reversal dynamics is well described by the Bloch equation via a reversal time that does not depend on temperature, but strongly decreases with increasing pump fluence. A comparison to data obtained in external saturation field and in remanence opened the way to separate the contributions due to temperature induced effects within single domains from those related to field induced domain formation.


©2001 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.65.012413
DOI: 10.1103/PhysRevB.65.012413
PACS: 72.15.Jf, 78.47.+p, 85.70.Sq

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