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

doi:10.1016/0379-6779(93)90078-B

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

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

17 Citations (Scopus)

Abstract

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 H_g and A_g modes in TDAE-C₆₀ indicates transfer of one electron to C₆₀ while the broadening of H_g 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 T_c 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 H_g and A_g Raman modes disappear while a new band appears at 1848 cm^-1.

Original language	English
Pages (from-to)	3050-3056
Number of pages	7
Journal	Synthetic Metals
Volume	56
Issue number	2-3
DOIs	https://doi.org/10.1016/0379-6779(93)90078-B
Publication status	Published - Apr 5 1993
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/0379-6779(93)90078-B

Cite this

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title = "Raman scattering in ferromagnetic TDAE-C60 compared to TDAE-C70",

abstract = "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.",

author = "Denisov, \{V. N.\} and Zakhidov, \{A. A.\} and G. Ruani and R. Zamboni and C. Taliani and K. Tanaka and K. Yoshizawa and T. Okahara and T. Yamabe and Y. Achiba",

year = "1993",

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doi = "10.1016/0379-6779(93)90078-B",

language = "English",

volume = "56",

pages = "3050--3056",

journal = "Synthetic Metals",

issn = "0379-6779",

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TY - JOUR

T1 - Raman scattering in ferromagnetic TDAE-C60 compared to TDAE-C70

AU - Denisov, V. N.

AU - Zakhidov, A. A.

AU - Ruani, G.

AU - Zamboni, R.

AU - Taliani, C.

AU - Tanaka, K.

AU - Yoshizawa, K.

AU - Okahara, T.

AU - Yamabe, T.

AU - Achiba, Y.

PY - 1993/4/5

Y1 - 1993/4/5

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0004426711

UR - https://www.scopus.com/pages/publications/0004426711#tab=citedBy

U2 - 10.1016/0379-6779(93)90078-B

DO - 10.1016/0379-6779(93)90078-B

M3 - Article

AN - SCOPUS:0004426711

SN - 0379-6779

VL - 56

SP - 3050

EP - 3056

JO - Synthetic Metals

JF - Synthetic Metals

IS - 2-3

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

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