Density dependence of zinc-blende MnAs dots studied by X-ray absorption spectroscopy and X-ray magnetic circular dichroism

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Abstract

Zinc-blende type nanoscale MnAs dots were grown on a sulfur-passivated GaAs (001) surface by molecular beam epitaxy. We report on the dot density dependence of the X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) in the Mn 2p core-level region. The XAS spectrum of low-density MnAs dots showed "localized" behavior as in the case of (Ga,Mn)As, while the spectrum of high-density MnAs dots changed to metallic behavior. The magnetic-field dependence of the XMCD revealed ferromagnetic behavior in the case of high-density MnAs dots. © 2003 Elsevier B.V. All rights reserved.

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Okabayashi, J., Mizuguchi, M., Ono, K., Oshima, M., Fujimori, A., Yuri, M., … Akinaga, H. (2004). Density dependence of zinc-blende MnAs dots studied by X-ray absorption spectroscopy and X-ray magnetic circular dichroism. In Journal of Magnetism and Magnetic Materials (Vol. 272–276). https://doi.org/10.1016/j.jmmm.2003.12.803

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