Temperature-Induced Valence Transition of EuNi 2 (81 0.25Ge 0.75,75) 2 Studied by Eu 4d-4f Resonant Photoemission and Optical Conductivity

Shin Ichi Kimura, Mitsuru Okuno, Hideki Iwata, Tomohiko Saitoh, Taichi Okuda, Ayumi Harasawa, Toyohiko Kinoshita, Akihiro Mltsuda, Hirofumi Wada, Masayuki Shiga

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Eu 4d-4f resonant photoemission and optical reflectivity measurements of a temperature- induced valence transition material, EuNi2(Si 0.25Ge 0.75) 2, have been performed at several temperatures. The valence transition was observed and the mean valence was evaluated to be 2.37 ± 0.02 and 2.75 ± 0.25 below and above the valence transition temperature, respectively. The mixing between the Ni 3d conduction band and the Eu 3+ 4/ hole becomes weak as the temperature increases, showing the valence transition from Eu 3+ to Eu 2+.

Original languageEnglish
Pages (from-to)255-257
Number of pages3
JournalJournal of the Physical Society of Japan
Volume71
Issue numberSUPPL.
Publication statusPublished - 2002
Externally publishedYes

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photoelectric emission
valence
conductivity
temperature
conduction bands
transition temperature
reflectance

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Kimura, S. I., Okuno, M., Iwata, H., Saitoh, T., Okuda, T., Harasawa, A., ... Shiga, M. (2002). Temperature-Induced Valence Transition of EuNi 2 (81 0.25Ge 0.75,75) 2 Studied by Eu 4d-4f Resonant Photoemission and Optical Conductivity. Journal of the Physical Society of Japan, 71(SUPPL.), 255-257.

Temperature-Induced Valence Transition of EuNi 2 (81 0.25Ge 0.75,75) 2 Studied by Eu 4d-4f Resonant Photoemission and Optical Conductivity. / Kimura, Shin Ichi; Okuno, Mitsuru; Iwata, Hideki; Saitoh, Tomohiko; Okuda, Taichi; Harasawa, Ayumi; Kinoshita, Toyohiko; Mltsuda, Akihiro; Wada, Hirofumi; Shiga, Masayuki.

In: Journal of the Physical Society of Japan, Vol. 71, No. SUPPL., 2002, p. 255-257.

Research output: Contribution to journalArticle

Kimura, SI, Okuno, M, Iwata, H, Saitoh, T, Okuda, T, Harasawa, A, Kinoshita, T, Mltsuda, A, Wada, H & Shiga, M 2002, 'Temperature-Induced Valence Transition of EuNi 2 (81 0.25Ge 0.75,75) 2 Studied by Eu 4d-4f Resonant Photoemission and Optical Conductivity', Journal of the Physical Society of Japan, vol. 71, no. SUPPL., pp. 255-257.
Kimura, Shin Ichi ; Okuno, Mitsuru ; Iwata, Hideki ; Saitoh, Tomohiko ; Okuda, Taichi ; Harasawa, Ayumi ; Kinoshita, Toyohiko ; Mltsuda, Akihiro ; Wada, Hirofumi ; Shiga, Masayuki. / Temperature-Induced Valence Transition of EuNi 2 (81 0.25Ge 0.75,75) 2 Studied by Eu 4d-4f Resonant Photoemission and Optical Conductivity. In: Journal of the Physical Society of Japan. 2002 ; Vol. 71, No. SUPPL. pp. 255-257.
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AU - Iwata, Hideki

AU - Saitoh, Tomohiko

AU - Okuda, Taichi

AU - Harasawa, Ayumi

AU - Kinoshita, Toyohiko

AU - Mltsuda, Akihiro

AU - Wada, Hirofumi

AU - Shiga, Masayuki

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