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Bulk-sensitive photoemission spectroscopy of A(2)FeMoO(6) double perovskites (A = Sr, Ba) SCIE SCOPUS

Title
Bulk-sensitive photoemission spectroscopy of A(2)FeMoO(6) double perovskites (A = Sr, Ba)
Authors
Kang, JSKim, JHSekiyama, AKasai, SSuga, SHan, SWKim, KHMuro, TSaitoh, YHwang, COlson, CGPark, BJLee, BWShim, JHPark, JHMin, BI
Date Issued
2002-09-15
Publisher
AMERICAN PHYSICAL SOC
Abstract
The electronic structures of Sr2FeMoO6 (SFMO) and Ba2FeMoO6 (BFMO) double perovskites have been investigated using Fe 2p-->3d resonant photoemission spectroscopy (PES) and the Cooper minimum in the Mo 4d photoionization cross section. The states close to the Fermi level are found to have a strongly mixed Mo-Fe t(2g) character, indicating that the Fe valence is far from pure 3+. The Fe 2p(3/2) x-ray absorption spectroscopy spectra reveal the mixed-valent Fe3+-Fe2+ configurations, and a larger Fe2+ component for BFMO than for SFMO, suggesting an operative double exchange interaction. The valence-band PES spectra reveal good agreement with the local-spin-density-approximation (LSDA)+U calculation.
URI
https://oasis.postech.ac.kr/handle/2014.oak/12088
DOI
10.1103/PHYSREVB.66.113105
ISSN
1098-0121
Article Type
Article
Citation
PHYSICAL REVIEW B, vol. 66, no. 11, 2002-09-15
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