In situ multifrequency ferromagnetic resonance and x-ray magnetic circular dichroism investigations on Fe/GaAs(110): Enhanced g-factor

We determined the magnetic anisotropy energy and g-factor of an uncapped 10nm thick Fe/GaAs(110) film using a setup that allows frequency (1.5-26.5GHz) as well as angular dependent ferromagnetic resonance measurements under ultrahigh vacuum conditions. The g-factor g = 2 . 61 ± 0 . 1 is unusually hi...

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Bibliographic Details
Published in:	Applied physics letters Vol. 100; no. 9; pp. 092402 - 092402-4
Main Authors:	Römer, F. M., Möller, M., Wagner, K., Gathmann, L., Narkowicz, R., Zähres, H., Salles, B. R., Torelli, P., Meckenstock, R., Lindner, J., Farle, M.
Format:	Journal Article
Language:	English
Published:	American Institute of Physics 27-02-2012
Online Access:	Get full text
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Summary:	We determined the magnetic anisotropy energy and g-factor of an uncapped 10nm thick Fe/GaAs(110) film using a setup that allows frequency (1.5-26.5GHz) as well as angular dependent ferromagnetic resonance measurements under ultrahigh vacuum conditions. The g-factor g = 2 . 61 ± 0 . 1 is unusually high at room temperature and can be interpreted as the result of an increased orbital moment due to strain. This interpretation is supported by more surface sensitive x-ray magnetic circular dichroism measurements which yield g = 2 . 21 ± 0 . 02 measured at remanence. The difference in g may be the result of magnetic field dependent magnetostriction which influences the orbital moment.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/1.3687726