Temperature and polarization dependence of Fe L3-edge X-ray absorption spectra of LuFe2O4

A. Agui; M. Mizumaki; T. Kuroda; M. Kawai; T. Nagata; N. Ikeda; T. Uozumi

doi:10.1016/j.elspec.2014.08.008

Temperature and polarization dependence of Fe L₃-edge X-ray absorption spectra of LuFe₂O₄

A. Agui, M. Mizumaki, T. Kuroda, M. Kawai, T. Nagata, N. Ikeda, T. Uozumi

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

4 Citations (Scopus)

Abstract

The charge ordering of Fe²⁺ and Fe³⁺ ions in LuFe₂O₄ induces ferroelectricity below 330 K. In this study, the X-ray absorption spectra (XAS) at the Fe L_2,3-edge are investigated to study charge ordered- and disordered-states. The polarization dependence of XAS revealed that the energy level of (d_xy, d_x2-y2) is lower than that of (d_yz, d_zx). In the charge-ordered state, the Fe L₃-XAS shows a double-peak structure, which is a characteristic of Fe²⁺ and Fe³⁺ ions. In the high-temperature region, the double-peak structure becomes a broad single peak, because of overlap with the thermally excited state.

Original language	English
Pages (from-to)	13-16
Number of pages	4
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	197
DOIs	https://doi.org/10.1016/j.elspec.2014.08.008
Publication status	Published - Dec 2014

Keywords

Charge order
LuFeO
Soft X-ray spectroscopy
Temperature dependence
X-ray absorption

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

Access to Document

10.1016/j.elspec.2014.08.008

Cite this

@article{913bb5181f3841638d46a84cef96a36e,

title = "Temperature and polarization dependence of Fe L3-edge X-ray absorption spectra of LuFe2O4",

abstract = "The charge ordering of Fe2+ and Fe3+ ions in LuFe2O4 induces ferroelectricity below 330 K. In this study, the X-ray absorption spectra (XAS) at the Fe L2,3-edge are investigated to study charge ordered- and disordered-states. The polarization dependence of XAS revealed that the energy level of (dxy, dx2-y2) is lower than that of (dyz, dzx). In the charge-ordered state, the Fe L3-XAS shows a double-peak structure, which is a characteristic of Fe2+ and Fe3+ ions. In the high-temperature region, the double-peak structure becomes a broad single peak, because of overlap with the thermally excited state.",

keywords = "Charge order, LuFeO, Soft X-ray spectroscopy, Temperature dependence, X-ray absorption",

author = "A. Agui and M. Mizumaki and T. Kuroda and M. Kawai and T. Nagata and N. Ikeda and T. Uozumi",

note = "Funding Information: This study was performed at the facility of BL27SU (Proposal Nos. 2013B1234, 2012B1299, 2011B1312, and 2010B1150) at SPring-8 with approval of the Japan Synchrotron Radiation Research Institute (JASRI). This study was supported by the JSPS Grant-in-Aid for Scientific Research (C) KAKENHI Number 23540382 . Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

year = "2014",

month = dec,

doi = "10.1016/j.elspec.2014.08.008",

language = "English",

volume = "197",

pages = "13--16",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

publisher = "Elsevier",

}

TY - JOUR

T1 - Temperature and polarization dependence of Fe L3-edge X-ray absorption spectra of LuFe2O4

AU - Agui, A.

AU - Mizumaki, M.

AU - Kuroda, T.

AU - Kawai, M.

AU - Nagata, T.

AU - Ikeda, N.

AU - Uozumi, T.

N1 - Funding Information: This study was performed at the facility of BL27SU (Proposal Nos. 2013B1234, 2012B1299, 2011B1312, and 2010B1150) at SPring-8 with approval of the Japan Synchrotron Radiation Research Institute (JASRI). This study was supported by the JSPS Grant-in-Aid for Scientific Research (C) KAKENHI Number 23540382 . Publisher Copyright: © 2014 Elsevier B.V. All rights reserved.

PY - 2014/12

Y1 - 2014/12

N2 - The charge ordering of Fe2+ and Fe3+ ions in LuFe2O4 induces ferroelectricity below 330 K. In this study, the X-ray absorption spectra (XAS) at the Fe L2,3-edge are investigated to study charge ordered- and disordered-states. The polarization dependence of XAS revealed that the energy level of (dxy, dx2-y2) is lower than that of (dyz, dzx). In the charge-ordered state, the Fe L3-XAS shows a double-peak structure, which is a characteristic of Fe2+ and Fe3+ ions. In the high-temperature region, the double-peak structure becomes a broad single peak, because of overlap with the thermally excited state.

AB - The charge ordering of Fe2+ and Fe3+ ions in LuFe2O4 induces ferroelectricity below 330 K. In this study, the X-ray absorption spectra (XAS) at the Fe L2,3-edge are investigated to study charge ordered- and disordered-states. The polarization dependence of XAS revealed that the energy level of (dxy, dx2-y2) is lower than that of (dyz, dzx). In the charge-ordered state, the Fe L3-XAS shows a double-peak structure, which is a characteristic of Fe2+ and Fe3+ ions. In the high-temperature region, the double-peak structure becomes a broad single peak, because of overlap with the thermally excited state.

KW - Charge order

KW - LuFeO

KW - Soft X-ray spectroscopy

KW - Temperature dependence

KW - X-ray absorption

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DO - 10.1016/j.elspec.2014.08.008

M3 - Article

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SN - 0368-2048

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JO - Journal of Electron Spectroscopy and Related Phenomena

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