Electronic origin of giant magnetic anisotropy in multiferroic LuFe2O4

K. T. Ko; H. J. Noh; J. Y. Kim; B. G. Park; J. H. Park; A. Tanaka; S. B. Kim; C. L. Zhang; S. W. Cheong

doi:10.1103/PhysRevLett.103.207202

Electronic origin of giant magnetic anisotropy in multiferroic LuFe2O4

K. T. Ko, H. J. Noh, J. Y. Kim, B. G. Park, J. H. Park, A. Tanaka, S. B. Kim, C. L. Zhang, S. W. Cheong

School of Arts and Sciences, Physics & Astronomy

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

We investigated the orbital anisotropy of LuFe2O4 using the Fe L2,3- and O K-edge x-ray absorption spectroscopy (XAS) and cluster model calculations. X-ray magnetic circular dichroism reveals a surprisingly large orbital magnetic moment (mo∼0.8μB/f.u.), which originates the giant magnetic anisotropy. The polarization dependent XAS enables us to identify the orbital states and occupations, different from the band calculation predictions. These findings were examined by using the cluster model analysis, which also explains the orbital magnetic moment as well as the total moment (2.9μB/f.u.). Taking into account the charge order, we also determined the spin structure.

Original language	English (US)
Article number	207202
Journal	Physical review letters
Volume	103
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.103.207202
State	Published - Nov 12 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.103.207202

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title = "Electronic origin of giant magnetic anisotropy in multiferroic LuFe2O4",

abstract = "We investigated the orbital anisotropy of LuFe2O4 using the Fe L2,3- and O K-edge x-ray absorption spectroscopy (XAS) and cluster model calculations. X-ray magnetic circular dichroism reveals a surprisingly large orbital magnetic moment (mo∼0.8μB/f.u.), which originates the giant magnetic anisotropy. The polarization dependent XAS enables us to identify the orbital states and occupations, different from the band calculation predictions. These findings were examined by using the cluster model analysis, which also explains the orbital magnetic moment as well as the total moment (2.9μB/f.u.). Taking into account the charge order, we also determined the spin structure.",

author = "Ko, {K. T.} and Noh, {H. J.} and Kim, {J. Y.} and Park, {B. G.} and Park, {J. H.} and A. Tanaka and Kim, {S. B.} and Zhang, {C. L.} and Cheong, {S. W.}",

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doi = "10.1103/PhysRevLett.103.207202",

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AU - Ko, K. T.

AU - Noh, H. J.

AU - Kim, J. Y.

AU - Park, B. G.

AU - Park, J. H.

AU - Tanaka, A.

AU - Kim, S. B.

AU - Zhang, C. L.

AU - Cheong, S. W.

PY - 2009/11/12

Y1 - 2009/11/12

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AB - We investigated the orbital anisotropy of LuFe2O4 using the Fe L2,3- and O K-edge x-ray absorption spectroscopy (XAS) and cluster model calculations. X-ray magnetic circular dichroism reveals a surprisingly large orbital magnetic moment (mo∼0.8μB/f.u.), which originates the giant magnetic anisotropy. The polarization dependent XAS enables us to identify the orbital states and occupations, different from the band calculation predictions. These findings were examined by using the cluster model analysis, which also explains the orbital magnetic moment as well as the total moment (2.9μB/f.u.). Taking into account the charge order, we also determined the spin structure.

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Electronic origin of giant magnetic anisotropy in multiferroic LuFe2O4

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