Theory of Magnetic Circular Dichroism of the Ce L2,3 X-ray Absorption Spectra in Mixed Valence Vompound CeFe2

Kaname Asakura; Isao Harada; Keiji Fukui; Haruhiko Ogasawara; J. C. Parlebas; Akio Kotani

doi:10.1143/JPSJ.73.2008

Theory of Magnetic Circular Dichroism of the Ce L_2,3 X-ray Absorption Spectra in Mixed Valence Vompound CeFe₂

Kaname Asakura, Isao Harada, Keiji Fukui, Haruhiko Ogasawara, J. C. Parlebas, Akio Kotani

次世代人材育成センター

研究成果 › 査読

22 被引用数 (Scopus)

抄録

Magnetic circular dichroism (MCD) of x-ray absorption spectroscopy (XAS) at Ce L_2,3 edges in the typical mixed valence compound CeFe₂ is theoretically studied by using the impurity Anderson model combined with a cluster approach. It is found that the energy-dependent polarization of Ce 5d states due to mixing with spin-polarized Fe 3d states is indispensable for explaining the spectra. Our calculations reproduce well the two-peak structure observed in XAS and MCD experiments, especially their energy position, spectral width and energy separation of the two peaks. For a detailed analysis of these, the Coulomb interactions — U_dc (between a 5d electron and a core hole) and U_fa (between a 4f electron and a 5d electron) play a special role.

本文言語	English
ページ（範囲）	2008-2013
ページ数	6
ジャーナル	journal of the physical society of japan
巻	73
号	7
DOI	https://doi.org/10.1143/JPSJ.73.2008
出版ステータス	Published - 2004

ASJC Scopus subject areas

物理学および天文学（全般）

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10.1143/JPSJ.73.2008

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title = "Theory of Magnetic Circular Dichroism of the Ce L2,3 X-ray Absorption Spectra in Mixed Valence Vompound CeFe2",

abstract = "Magnetic circular dichroism (MCD) of x-ray absorption spectroscopy (XAS) at Ce L2,3 edges in the typical mixed valence compound CeFe2 is theoretically studied by using the impurity Anderson model combined with a cluster approach. It is found that the energy-dependent polarization of Ce 5d states due to mixing with spin-polarized Fe 3d states is indispensable for explaining the spectra. Our calculations reproduce well the two-peak structure observed in XAS and MCD experiments, especially their energy position, spectral width and energy separation of the two peaks. For a detailed analysis of these, the Coulomb interactions — Udc (between a 5d electron and a core hole) and Ufa (between a 4f electron and a 5d electron) play a special role.",

keywords = "L absorption edges, cluster model, magnetic circular dichroism, mixed valence compound",

author = "Kaname Asakura and Isao Harada and Keiji Fukui and Haruhiko Ogasawara and Parlebas, {J. C.} and Akio Kotani",

note = "Funding Information: The present work is partially supported by the Centre National de la Recherche Scientifique (France) through the PICS program.",

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T1 - Theory of Magnetic Circular Dichroism of the Ce L2,3 X-ray Absorption Spectra in Mixed Valence Vompound CeFe2

AU - Asakura, Kaname

AU - Harada, Isao

AU - Fukui, Keiji

AU - Ogasawara, Haruhiko

AU - Parlebas, J. C.

AU - Kotani, Akio

N1 - Funding Information: The present work is partially supported by the Centre National de la Recherche Scientifique (France) through the PICS program.

PY - 2004

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N2 - Magnetic circular dichroism (MCD) of x-ray absorption spectroscopy (XAS) at Ce L2,3 edges in the typical mixed valence compound CeFe2 is theoretically studied by using the impurity Anderson model combined with a cluster approach. It is found that the energy-dependent polarization of Ce 5d states due to mixing with spin-polarized Fe 3d states is indispensable for explaining the spectra. Our calculations reproduce well the two-peak structure observed in XAS and MCD experiments, especially their energy position, spectral width and energy separation of the two peaks. For a detailed analysis of these, the Coulomb interactions — Udc (between a 5d electron and a core hole) and Ufa (between a 4f electron and a 5d electron) play a special role.

AB - Magnetic circular dichroism (MCD) of x-ray absorption spectroscopy (XAS) at Ce L2,3 edges in the typical mixed valence compound CeFe2 is theoretically studied by using the impurity Anderson model combined with a cluster approach. It is found that the energy-dependent polarization of Ce 5d states due to mixing with spin-polarized Fe 3d states is indispensable for explaining the spectra. Our calculations reproduce well the two-peak structure observed in XAS and MCD experiments, especially their energy position, spectral width and energy separation of the two peaks. For a detailed analysis of these, the Coulomb interactions — Udc (between a 5d electron and a core hole) and Ufa (between a 4f electron and a 5d electron) play a special role.

KW - L absorption edges

KW - cluster model

KW - magnetic circular dichroism

KW - mixed valence compound

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