Photoemission study of the Laves-phase compounds YMn2 and Y0.97Sc0.03Mn2

J. Y. Son; T. Mizokawa; A. Fujimori; K. Terao; H. Yamada; H. Wada; M. Shiga

doi:10.1016/S0038-1098(03)00351-X

Photoemission study of the Laves-phase compounds YMn₂ and Y_0.97Sc_0.03Mn₂

J. Y. Son, T. Mizokawa, A. Fujimori, K. Terao, H. Yamada, H. Wada, M. Shiga

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

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Abstract

A small amount of Sc substitution for Y in the antiferromagnetic metal YMn₂ results in a paramagnetic metal with a strongly enhanced electronic specific heat. We have studied the electronic structure of YMn₂ and Y_0.97Sc_0.03Mn₂ by photoemission spectroscopy. The spectra of YMn₂ taken above and below the Néel temperature did not show appreciable difference, and the spectra of YMn₂ and Y_0.97Sc_0.03Mn₂ were similar to each other. The photoemission spectra of the antiferromagnetic phase are well explained by band-structure calculation on the antiferromagnetic state while those of the paramagnetic phase are not explained by band-structure calculation on the paramagnetic state. These observations suggest that there are strong antiferromagnetic correlations in the paramagnetic phase. For the paramagnetic phase, agreement between experiment and calculation could be considerably improved by applying a model self-energy correction to the band density of states.

Original language	English
Pages (from-to)	237-241
Number of pages	5
Journal	Solid State Communications
Volume	127
Issue number	3
DOIs	https://doi.org/10.1016/S0038-1098(03)00351-X
Publication status	Published - Jul 2003
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/S0038-1098(03)00351-X

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title = "Photoemission study of the Laves-phase compounds YMn2 and Y0.97Sc0.03Mn2",

abstract = "A small amount of Sc substitution for Y in the antiferromagnetic metal YMn2 results in a paramagnetic metal with a strongly enhanced electronic specific heat. We have studied the electronic structure of YMn2 and Y0.97Sc0.03Mn2 by photoemission spectroscopy. The spectra of YMn2 taken above and below the N{\'e}el temperature did not show appreciable difference, and the spectra of YMn2 and Y0.97Sc0.03Mn2 were similar to each other. The photoemission spectra of the antiferromagnetic phase are well explained by band-structure calculation on the antiferromagnetic state while those of the paramagnetic phase are not explained by band-structure calculation on the paramagnetic state. These observations suggest that there are strong antiferromagnetic correlations in the paramagnetic phase. For the paramagnetic phase, agreement between experiment and calculation could be considerably improved by applying a model self-energy correction to the band density of states.",

author = "Son, {J. Y.} and T. Mizokawa and A. Fujimori and K. Terao and H. Yamada and H. Wada and M. Shiga",

year = "2003",

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doi = "10.1016/S0038-1098(03)00351-X",

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TY - JOUR

T1 - Photoemission study of the Laves-phase compounds YMn2 and Y0.97Sc0.03Mn2

AU - Son, J. Y.

AU - Mizokawa, T.

AU - Fujimori, A.

AU - Terao, K.

AU - Yamada, H.

AU - Wada, H.

AU - Shiga, M.

PY - 2003/7

Y1 - 2003/7

N2 - A small amount of Sc substitution for Y in the antiferromagnetic metal YMn2 results in a paramagnetic metal with a strongly enhanced electronic specific heat. We have studied the electronic structure of YMn2 and Y0.97Sc0.03Mn2 by photoemission spectroscopy. The spectra of YMn2 taken above and below the Néel temperature did not show appreciable difference, and the spectra of YMn2 and Y0.97Sc0.03Mn2 were similar to each other. The photoemission spectra of the antiferromagnetic phase are well explained by band-structure calculation on the antiferromagnetic state while those of the paramagnetic phase are not explained by band-structure calculation on the paramagnetic state. These observations suggest that there are strong antiferromagnetic correlations in the paramagnetic phase. For the paramagnetic phase, agreement between experiment and calculation could be considerably improved by applying a model self-energy correction to the band density of states.

AB - A small amount of Sc substitution for Y in the antiferromagnetic metal YMn2 results in a paramagnetic metal with a strongly enhanced electronic specific heat. We have studied the electronic structure of YMn2 and Y0.97Sc0.03Mn2 by photoemission spectroscopy. The spectra of YMn2 taken above and below the Néel temperature did not show appreciable difference, and the spectra of YMn2 and Y0.97Sc0.03Mn2 were similar to each other. The photoemission spectra of the antiferromagnetic phase are well explained by band-structure calculation on the antiferromagnetic state while those of the paramagnetic phase are not explained by band-structure calculation on the paramagnetic state. These observations suggest that there are strong antiferromagnetic correlations in the paramagnetic phase. For the paramagnetic phase, agreement between experiment and calculation could be considerably improved by applying a model self-energy correction to the band density of states.

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DO - 10.1016/S0038-1098(03)00351-X

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SN - 0038-1098

VL - 127

SP - 237

EP - 241

JO - Solid State Communications

JF - Solid State Communications

IS - 3

ER -

Photoemission study of the Laves-phase compounds YMn₂ and Y_0.97Sc_0.03Mn₂

Abstract

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