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

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

研究成果: Article

1 引用 (Scopus)

抄録

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.

元の言語English
ページ(範囲)237-241
ページ数5
ジャーナルSolid State Communications
127
発行部数3
DOI
出版物ステータスPublished - 2003 7
外部発表Yes

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Laves phases
Photoemission
photoelectric emission
Band structure
Metals
Photoelectron spectroscopy
metals
Specific heat
Electronic structure
Substitution reactions
specific heat
substitutes
electronic structure
electronics
spectroscopy
Experiments
Temperature
temperature
energy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

これを引用

Photoemission study of the Laves-phase compounds YMn2 and Y0.97Sc0.03Mn2. / Son, J. Y.; Mizokawa, Takashi; Fujimori, A.; Terao, K.; Yamada, H.; Wada, H.; Shiga, M.

:: Solid State Communications, 巻 127, 番号 3, 07.2003, p. 237-241.

研究成果: Article

Son, JY, Mizokawa, T, Fujimori, A, Terao, K, Yamada, H, Wada, H & Shiga, M 2003, 'Photoemission study of the Laves-phase compounds YMn2 and Y0.97Sc0.03Mn2', Solid State Communications, 巻. 127, 番号 3, pp. 237-241. https://doi.org/10.1016/S0038-1098(03)00351-X
Son, J. Y. ; Mizokawa, Takashi ; Fujimori, A. ; Terao, K. ; Yamada, H. ; Wada, H. ; Shiga, M. / Photoemission study of the Laves-phase compounds YMn2 and Y0.97Sc0.03Mn2. :: Solid State Communications. 2003 ; 巻 127, 番号 3. pp. 237-241.
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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 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.",
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AU - Son, J. Y.

AU - Mizokawa, Takashi

AU - Fujimori, A.

AU - Terao, K.

AU - Yamada, H.

AU - Wada, H.

AU - Shiga, M.

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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.

KW - A. Laves-phase compounds

KW - A. YScMn

KW - A. YMn

KW - D. Photoemission

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JF - Solid State Communications

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