Magnetic heat capacity of TDAE-C60

Kazuyoshi Tanaka; Toshiaki Tanaka; Tooru Atake; Kazunari Yoshizawa; Kenji Okahara; Tohru Sato; Tokio Yamabe

doi:10.1016/0009-2614(94)01143-5

Magnetic heat capacity of TDAE-C₆₀

Kazuyoshi Tanaka, Toshiaki Tanaka, Tooru Atake, Kazunari Yoshizawa, Kenji Okahara, Tohru Sato, Tokio Yamabe

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

Abstract

The heat capacity of TDAE-C₆₀ (TDAE: tetrakis(dimethylamino)ethylene) was measured between 5 and 100 K using an adiabatic calorimeter. The magnetic phase transition was detected as a broad heat capacity peak at 12.5 K. The enthalpy and entropy of transition are 0.43 kJ mol and 34 J K mol, respectively. Such a large value of the entropy of transition compared with 2R1n 2 = 11.5 J K mol expected for a localized spin- 1 2 system probably reflects the multi-state ofC^-₆₀ due to dynamic Jahn-Teller distortion in the high-temperature region above T_c.

Original language	English
Pages (from-to)	271-275
Number of pages	5
Journal	Chemical Physics Letters
Volume	230
Issue number	3
DOIs	https://doi.org/10.1016/0009-2614(94)01143-5
Publication status	Published - Nov 25 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Magnetic heat capacity of TDAE-C60",

abstract = "The heat capacity of TDAE-C60 (TDAE: tetrakis(dimethylamino)ethylene) was measured between 5 and 100 K using an adiabatic calorimeter. The magnetic phase transition was detected as a broad heat capacity peak at 12.5 K. The enthalpy and entropy of transition are 0.43 kJ mol and 34 J K mol, respectively. Such a large value of the entropy of transition compared with 2R1n 2 = 11.5 J K mol expected for a localized spin- 1 2 system probably reflects the multi-state ofC-60 due to dynamic Jahn-Teller distortion in the high-temperature region above Tc.",

author = "Kazuyoshi Tanaka and Toshiaki Tanaka and Tooru Atake and Kazunari Yoshizawa and Kenji Okahara and Tohru Sato and Tokio Yamabe",

year = "1994",

month = nov,

day = "25",

doi = "10.1016/0009-2614(94)01143-5",

language = "English",

volume = "230",

pages = "271--275",

journal = "Chemical Physics Letters",

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TY - JOUR

T1 - Magnetic heat capacity of TDAE-C60

AU - Tanaka, Kazuyoshi

AU - Tanaka, Toshiaki

AU - Atake, Tooru

AU - Yoshizawa, Kazunari

AU - Okahara, Kenji

AU - Sato, Tohru

AU - Yamabe, Tokio

PY - 1994/11/25

Y1 - 1994/11/25

N2 - The heat capacity of TDAE-C60 (TDAE: tetrakis(dimethylamino)ethylene) was measured between 5 and 100 K using an adiabatic calorimeter. The magnetic phase transition was detected as a broad heat capacity peak at 12.5 K. The enthalpy and entropy of transition are 0.43 kJ mol and 34 J K mol, respectively. Such a large value of the entropy of transition compared with 2R1n 2 = 11.5 J K mol expected for a localized spin- 1 2 system probably reflects the multi-state ofC-60 due to dynamic Jahn-Teller distortion in the high-temperature region above Tc.

AB - The heat capacity of TDAE-C60 (TDAE: tetrakis(dimethylamino)ethylene) was measured between 5 and 100 K using an adiabatic calorimeter. The magnetic phase transition was detected as a broad heat capacity peak at 12.5 K. The enthalpy and entropy of transition are 0.43 kJ mol and 34 J K mol, respectively. Such a large value of the entropy of transition compared with 2R1n 2 = 11.5 J K mol expected for a localized spin- 1 2 system probably reflects the multi-state ofC-60 due to dynamic Jahn-Teller distortion in the high-temperature region above Tc.

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U2 - 10.1016/0009-2614(94)01143-5

DO - 10.1016/0009-2614(94)01143-5

M3 - Article

SN - 0009-2614

VL - 230

SP - 271

EP - 275

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3

ER -

Magnetic heat capacity of TDAE-C₆₀

Abstract

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