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JOURNAL OF APPLIED PHYSICS
Volume 87, Issue 9, Pages 5926-5928Publisher
AMER INST PHYSICS
DOI: 10.1063/1.372569
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We present the magnetization reversal dynamics of epitaxial Fe thin films grown on GaAs(001) and InAs(001) studied as a function of field sweep rate in the range 0.01-160 kOe/s using magneto-optic Kerr effect. For 55 and 250 Angstrom Fe/GaAs(001), we find that the hysteresis loop area A follows the scaling relation A proportional to H-alpha with alpha=0.03-0.05 at low sweep rates and 0.33-0.40 at high sweep rates. For the 150 Angstrom Fe/InAs(001) film, alpha is found to be similar to 0.02 at low sweep rates and similar to 0.17 at high sweep rates. The differing values of alpha are attributed to a change of the magnetization reversal process with increasing sweep rate. (C) 2000 American Institute of Physics. [S0021-8979(00)48608-1].
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