Microscopic origin of ferrimagnetism of a double perovskite Sr2FeMoO6: An x-ray magnetic circular dichroism study

1st Conference on Light and Particle Beams in Materials Science 2013

物理学;材料科学

Koide, T.^1 ; Sekine, T.^1 ; Miyauchi, H.^1 ; Manaka, H.^1 ; Asakura, D.^1 ; Fujimori, A.^2 ; Kobayashi, K.-I.^3 ; Tomioka, Y.^3 ; Kimura, T.^4 ; Tokura, Y.^3,4

Photon Factory, IMSS, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan^1

Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan^2

CERC, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8568, Tsukuba, Japan^3

Department of Applied Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan^4

关键词: Double perovskites;    Hybridized bands;    Large spin;    Magnetic state;    O K-edges;    Orbital moment;    Sr2FeMoO6;    X-ray magnetic circular dichroism;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/502/1/012003/pdf
DOI  :  10.1088/1742-6596/502/1/012003

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We have studied the microscopic magnetic state of a double perovskite Sr2FeMoO6 by x-ray magnetic circular dichroism (XMCD). An Fe L3,2-edge XMCD reveals that the formal Fe3+ions have an appreciable orbital moment (morb) parallel to their large spin moment (mspin), showing the charge-transfer-induced, minority-spin (-) Fe t2g electrons. A weak but undoubted O K-edge XMCD was successfully detected, showing an O 2p-hole morb induced by 2p-3d hybridization. Along with information obtained from the observed Mo M3,2-edge XMCD, our findings verify the partially filled Fe 3d t2g-O 2pπ-Mo 4d t2g- hybridized bands at the Fermi level, which mediates ferrimagnetism.