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ABSTRACT: Mn L<sub>2,3</sub> x-ray absorption and magnetic circular dichroism study has been performed on IV-VI ferromagnetic semiconductor Ge <sub>1-x</sub> Mn <sub>x</sub> Te with different Mn compositions x=0.12 , 0.32, 0.51, and 1. The absorption and dichroism line shapes are found to be almost independent of the Mn composition, suggesting that the local chemical environment of Mn atoms is the same for Ge <sub>1-x</sub> Mn <sub>x</sub> Te with the wide range of x . On the basis of the configuration interaction analysis for a Mn Te <sub>6</sub> cluster, the electronic structure parameters such as the p-d hybridization and the p-d exchange constant have been estimated.
Journal of Applied Physics 05/2006; · 2.17 Impact Factor
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ABSTRACT: Mn 3d electronic structure in IV–VI ferromagnetic semiconductor Ge1−xMnxTe (x = 0.32) has been investigated by means of the soft X-ray magnetic circular dichroism (XMCD) measurements of the Mn 2p-3d absorption spectra (XAS spectra). The XAS and XMCD spectra show a characteristic feature of the localized Mn2+ 3d states. From the analyses of the spectra based on the configuration interaction theory, the parameters such as the p-d hybridization and p-d exchange constant N0β are estimated.
Journal of Electron Spectroscopy and Related Phenomena · 1.96 Impact Factor
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S. Senba,
K. Fujimoto,
H. Sato,
Y. Fukuma,
M. Nakatake,
M. Arita,
K. Tsuji,
H. Asada,
T. Koyanagi,
H. Namatame, M. Taniguchi
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ABSTRACT: In order to investigate the Mn 3d electronic structure in IV–VI ferromagnetic semiconductor Ge1−xMnxTe, we have carried out the Mn 3p–3d resonant photoemission spectroscopy (RPES) and Mn 2p–3d soft X-ray emission spectroscopy (SXES). The Mn 3d partial density of states derived from the RPES spectra and the excitation-energy-dependent SXES spectra indicate that the Mn 3d states of Ge1−xMnxTe are nearly localized with the divalent character.
Journal of Electron Spectroscopy and Related Phenomena · 1.96 Impact Factor
