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Hybrid Fe3O4/GaAs(100) structure for spintronics

Lu, Y.X., Claydon, J.S., Ahmad, E., Xu, Y.B., Ali, M., Hickey, B.J., Thompson, S.M., Matthew, J.A.D. and Wilson, K. (2005) Hybrid Fe3O4/GaAs(100) structure for spintronics. Journal of Applied Physics, 97 (10). Art no. 10C313 Part 2. ISSN 1089-7550

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Abstract

Fe3O4/GaAs hybrid structures have been studied using reflection high-energy electron diffraction (RHEED), x-ray photoelectron spectroscopy (XPS), x-ray magnetic circular dichroism (XMCD), and low-temperature vibrating-sample magnetometry (VSM). The samples were prepared by oxidizing epitaxial Fe thin films in a partial pressure of 5×10(–5) mbar of oxygen at 500 K for 180 s. Clear RHEED patterns were observed, suggesting the epitaxial growth of Fe oxides with a cubic structure. The XPS spectra show that the oxides were Fe3O4 rather than gamma-Fe2O3, as there were no shake-up satellites between the two Fe 2p peaks. This was further confirmed by the XMCD measurements, which show ferromagnetic coupling between the Fe cations, with no evidence of intermixing at the interface. The VSM measurements show that the films have a magnetic uniaxial anisotropy and a "quick" saturation property, with the easy axes along the [011] direction. This detailed study offers further insight into the structure, interface, and magnetic properties of this hybrid Fe3O4/GaAs(100) structure as a promising system for spintronic application. © 2005 American Institute of Physics

Item Type: Article
Copyright, Publisher and Additional Information: © 2005 American Institute of Physics. Available from the author's web site (Associated URL field).
Keywords:
Institution: The University of Leeds, The University of York
Academic Units: The University of Leeds > Faculty of Maths and Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds)
The University of York > Electronics (York)
The University of York > Chemistry (York)
The University of York > Physics (York)
Depositing User: Repository Officer
Date Deposited: 08 Jan 2007
Last Modified: 29 Sep 2010 14:15
Published Version: http://dx.doi.org/10.1063/1.1857432
Status: Published
Publisher: American Institute of Physics
Refereed: Yes
Identification Number: 10.1063/1.1857432
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/1893

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