標題: Orbital moments of CrO2 and Fe3O4 studied by MCD in soft X-ray absorption
作者: Huang, DJ
Chang, CF
Chen, J
Lin, HJ
Chung, SC
Jeng, HT
Guo, GY
Wu, WB
Shyu, SG
Chen, CT
電子物理學系
Department of Electrophysics
關鍵字: X-ray absorption;orbital moments;MCD
公開日期: 1-Jul-2004
摘要: We present studies of orbital magnetic moments of CrO2 and Fe3O4 by measuring magnetic circular dichroism (MCD) in soft X-ray absorption. The results show that Fe3O4 exhibits large orbital moments, as a consequence of the strong Coulomb interactions of Fe 3d electrons. In contrast, orbital moments of Cr in CrO2 are nearly quenched, revealing that Cr 3d electrons are strongly hybridized with O 2p electrons and more delocalized as compared with those of Fe in Fe3O4. Comparing the MCD data with the band structure calculations based on local spin density approximation with on-site Coulomb energy U taken into account, we conclude that to include the on-site Coulomb interactions of 3d electrons is essential for adequately describing the electronic structure of CrO2 and Fe3O4. (C) 2004 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.elspec.2004.02.058
http://hdl.handle.net/11536/26634
ISSN: 0368-2048
DOI: 10.1016/j.elspec.2004.02.058
期刊: JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
Volume: 137
Issue: 
起始頁: 633
結束頁: 639
Appears in Collections:Conferences Paper


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