Electronic structure of Cr1-δX(X=S, Te) studied by Cr 2p soft x-ray magnetic circular dichroism

Yaji Koichiro

Kimura Akio

Hirai Chiyuki

Taniguchi Masaki

Koyama Michie

Sato Hitoshi

Shimada Kenya

Tanaka Arata

Muro Takayuki

Imada Shin

Suga Shigemasa

Physical Review B - Condensed Matter and Materials Physics

Cr 2p core excited x-ray absorption and x-ray magnetic circular dichroism (XMCD) spectra of ferromagnetic Cr1-δTe with several concentrations of δ=0.11-0.33 and ferrimagnetic Cr5S 6 have been measured. The observed XMCD line shapes are found to very weakly depend on δ for Cr1-δTe, The experimental results are analyzed by means of a configuration-interaction cluster model calculation with consideration of hybridization and electron correlation effects. The obtained values of the spin magnetic moment by the cluster model analyses are in agreement with the results of the band structure calculation. The calculated result shows that the doped holes created by the Cr deficiency exist mainly in the Te 5p orbital of Cr1-δTe, whereas the holes are likely to be in the Cr 3d state for Cr5S6.

chromium compounds

ferrimagnetic materials

ferromagnetic materials

band structure

magnetic circular dichroism

X-ray absorption spectra

electron correlations

magnetic moments

configuration interactions

spectral line breadth

eng

American Physical Society

Copyright (c) 2004 The American Physical Society.

[ISSN] 0163-1829

[DOI] 10.1103/PhysRevB.70.064402

[NCID] AA11187113

[DOI] http://dx.doi.org/10.1103/PhysRevB.70.064402