Bulk-sensitive photoemission spectroscopy of A_2FeMoO_6 double perovskites (A=Sr, Ba)

J. -S. Kang; J. H. Kim; A. Sekiyama; S. Kasai; S. Suga; S. W. Han; K. H. Kim; T. Muro; Y. Saitoh; C. Hwang; C. G. Olson; B. J. Park; B. W. Lee; J. H. Shim; J. H. Park; B. I. Min

doi:10.1103/PhysRevB.66.113105

paper

Bulk-sensitive photoemission spectroscopy of A_2FeMoO_6 double perovskites (A=Sr, Ba)

arXiv:cond-mat/0203351 · doi:10.1103/PhysRevB.66.113105

Abstract

Electronic structures of Sr_2FeMoO_6 (SFMO) and Ba_2FeMoO_6 (BFMO) double perovskites have been investigated using the 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 strongly mixed Mo-Fe t_{2g} character, suggesting that the Fe valence is far from pure 3+. The Fe 2p_{3/2} XAS spectra indicate the mixed-valent Fe^{3+}-Fe^{2+} configurations, and the larger Fe^{2+} component for BFMO than for SFMO, suggesting a kind of double exchange interaction. The valence-band PES spectra reveal good agreement with the LSDA+U calculation.

4 pages, 3 figures

References in corpus (2)

Strong ferromangnetism and weak antiferroamgnetism in double perovskites: Sr $_{2}$ Fe{/it M}O $_{6}$ ({/it M}=Mo, W and Re)
Electronic and Magnetic Structures of Sr2FeMoO6

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