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Interface magnetic properties of epitaxial Fe-InAs heterostructures

By J. Wu, S. Wang, Y. Huttel, Y.B. Xu, M. Tselepi, J.A.C. Bland and G. van der Laan

Abstract

The growth and interface magnetic properties of epitaxial Fe films grown on InAs (100)-4 x 2 have been studied using low-energy electron diffraction, in situ magneto-optical Kerr effect, and X-ray magnetic circular dichronism. The magnetic properties at room temperature were found to proceed via three phases with thickness; a nonmagnetic phase, a superparamagnetic phase, and a ferromagnetic phase. The initial ferromagnetic phase might be stabilized by interparticle interactions. The films show bulk-like spin moments of 1.90+/-0.15 mu(B) with the thickness above about 20 ML and a large enhancement similar to 260% of the ratio of orbital versus spin moment in the ultrathin region

Year: 2002
DOI identifier: 10.1109/INTMAG.2002.1001069
OAI identifier: oai:eprints.whiterose.ac.uk:1842

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