X-ray absorption and magnetic circular dichroism characterization of Mo1-xFexO2 (x = 0-0.05) thin films grown by pulsed laser ablation

Title
X-ray absorption and magnetic circular dichroism characterization of Mo1-xFexO2 (x = 0-0.05) thin films grown by pulsed laser ablation
Authors
P. ThakurJ. C. CezarN. B. BrookesR. J. ChoudharyD. M. Phase채근화R. Kumar
Keywords
X-ray absorption spectroscopy; XMCD; Electronic structure
Issue Date
2010-12
Publisher
Hyperfine interactions
Citation
VOL 197, 95-100
Abstract
The electronic and magnetic properties of well characterized Mo1−xFexO2 (x = 0–0.5) thin films that show ferromagnetism at room temperature (RT) have been investigated by the means of near edge x-ray absorption fine structure (NEXAFS) and x-ray magnetic circular dichroism (XMCD) experiments at the O K-, Fe L-, and Mo M-edges. The NEXAFS spectra at O K- and Mo M3,2-edges show a strong hybridization of O 2p-4d Mo orbitals, and Mo ions change their symmetry with the substitution of Fe ions into MoO2 matrix. The Fe 2p NEXAFS/XMCD spectra exhibit multiple absorption peaks and an appreciableXMCDsignal that persists even at RT. These results demonstrate that Fe is in a mixed valence state of Fe2+–Fe3+, substituting at theMo site and that the Fe2+/3+ ions are ferromagnetically polarized.
URI
http://pubs.kist.re.kr/handle/201004/39482
ISSN
0304-3843
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KIST Publication > Article
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