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

Educational Center for Researchers of the Next Generation

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

22 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	2008-2013
Number of pages	6
Journal	journal of the physical society of japan
Volume	73
Issue number	7
DOIs	https://doi.org/10.1143/JPSJ.73.2008
Publication status	Published - 2004

Keywords

L absorption edges
cluster model
magnetic circular dichroism
mixed valence compound

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.73.2008

Cite this

@article{58c59e9d20fa4d85a38f3729becdfe1e,

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.",

year = "2004",

doi = "10.1143/JPSJ.73.2008",

language = "English",

volume = "73",

pages = "2008--2013",

journal = "journal of the physical society of japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "7",

}

TY - JOUR

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

Y1 - 2004

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

UR - http://www.scopus.com/inward/record.url?scp=17544371885&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17544371885&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.73.2008

DO - 10.1143/JPSJ.73.2008

M3 - Article

AN - SCOPUS:17544371885

SN - 0031-9015

VL - 73

SP - 2008

EP - 2013

JO - journal of the physical society of japan

JF - journal of the physical society of japan

IS - 7

ER -