Raman scattering in ferromagnetic TDAE-C60 compared to TDAE-C70

V. N. Denisov, A. A. Zakhidov, G. Ruani, R. Zamboni, C. Taliani, K. Tanaka, K. Yoshizawa, T. Okahara, T. Yamabe, Y. Achiba

研究成果: Contribution to journalArticle査読

17 被引用数 (Scopus)

抄録

The Raman scattering at 1.16 eV laser excitation has been studied in ferromagnetic TDAE-C60 and compared to that in paramagnetic TDAE-C70. The shift of Hg and Ag modes in TDAE-C60 indicates transfer of one electron to C60 while the broadening of Hg modes is quite similar to metallic K3C60 meaning significant electron-phonon coupling of this Jahn - Teller vibrations. In TDAE-C70 the lines are narrow sugesting suppresed electron - phonon interaction and hence smaller polaronic effects. Below Tc of magnetic ordering the two-magnon excitations are not seen clearly however the low energy part of spectra shows somewhat increased intensity. Upon air-exposure of TDAE-C60 all Hg and Ag Raman modes disappear while a new band appears at 1848 cm-1.

本文言語英語
ページ(範囲)3050-3056
ページ数7
ジャーナルSynthetic Metals
56
2-3
DOI
出版ステータス出版済み - 4 5 1993
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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