Possible low-temperature phase transition of Langmuir-Blodgett films of a charge-transfer complex detected by ESR

Keiichi Ikegami; Shin Ichi Kuroda; Tomoyuki Akutagawa; Taro Konuma; Takayoshi Nakamura; Mutsuyoshi Matsumoto; Sachio Horiuchi; Hideki Yamochi; Gunzi Saito

doi:10.1016/S0040-6090(98)00660-9

Possible low-temperature phase transition of Langmuir-Blodgett films of a charge-transfer complex detected by ESR

Keiichi Ikegami, Shin Ichi Kuroda, Tomoyuki Akutagawa, Taro Konuma, Takayoshi Nakamura, Mutsuyoshi Matsumoto, Sachio Horiuchi, Hideki Yamochi, Gunzi Saito

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

2 Citations (Scopus)

Abstract

The electron spin resonance (ESR) measurements made on the highly conducting Langmuir-Blodgett (LB) films of a charge-transfer complex of bis(ethylenedioxy)tetrathiafulvalene (BO) and decyltetracyanoquinodimethane (C₁₀TCNQ), mixed with icosanoic acid, revealed microscopically the metallic nature of the system in a wide temperature range. Further, an anomalous increase in the ESR linewidth was detected around 140 K. To elucidate the origin of this anomaly, in situ ESR experiments upon annealing at low temperatures have been performed. The temperature dependence of the infrared spectrum has been also measured. The obtained results indicate a possible low-temperature phase transition of the present conducting LB system.

Original language	English
Pages (from-to)	391-394
Number of pages	4
Journal	Thin Solid Films
Volume	327-329
Issue number	1-2
DOIs	https://doi.org/10.1016/S0040-6090(98)00660-9
Publication status	Published - 1998 Jan 1
Externally published	Yes

Keywords

Charge-transfer complex
Conducting organic thin-film
Electron spin resonance
Infrared absorption spectroscopy
Langmuir-Blodgett film
Phase transition

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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Possible low-temperature phase transition of Langmuir-Blodgett films of a charge-transfer complex detected by ESR. / Ikegami, Keiichi; Kuroda, Shin Ichi; Akutagawa, Tomoyuki; Konuma, Taro; Nakamura, Takayoshi; Matsumoto, Mutsuyoshi; Horiuchi, Sachio; Yamochi, Hideki; Saito, Gunzi.

In: Thin Solid Films, Vol. 327-329, No. 1-2, 01.01.1998, p. 391-394.

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

@article{a9281dac40d443ea9592eba632aef613,

title = "Possible low-temperature phase transition of Langmuir-Blodgett films of a charge-transfer complex detected by ESR",

abstract = "The electron spin resonance (ESR) measurements made on the highly conducting Langmuir-Blodgett (LB) films of a charge-transfer complex of bis(ethylenedioxy)tetrathiafulvalene (BO) and decyltetracyanoquinodimethane (C10TCNQ), mixed with icosanoic acid, revealed microscopically the metallic nature of the system in a wide temperature range. Further, an anomalous increase in the ESR linewidth was detected around 140 K. To elucidate the origin of this anomaly, in situ ESR experiments upon annealing at low temperatures have been performed. The temperature dependence of the infrared spectrum has been also measured. The obtained results indicate a possible low-temperature phase transition of the present conducting LB system.",

keywords = "Charge-transfer complex, Conducting organic thin-film, Electron spin resonance, Infrared absorption spectroscopy, Langmuir-Blodgett film, Phase transition",

author = "Keiichi Ikegami and Kuroda, {Shin Ichi} and Tomoyuki Akutagawa and Taro Konuma and Takayoshi Nakamura and Mutsuyoshi Matsumoto and Sachio Horiuchi and Hideki Yamochi and Gunzi Saito",

year = "1998",

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doi = "10.1016/S0040-6090(98)00660-9",

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T1 - Possible low-temperature phase transition of Langmuir-Blodgett films of a charge-transfer complex detected by ESR

AU - Ikegami, Keiichi

AU - Kuroda, Shin Ichi

AU - Akutagawa, Tomoyuki

AU - Konuma, Taro

AU - Nakamura, Takayoshi

AU - Matsumoto, Mutsuyoshi

AU - Horiuchi, Sachio

AU - Yamochi, Hideki

AU - Saito, Gunzi

PY - 1998/1/1

Y1 - 1998/1/1

N2 - The electron spin resonance (ESR) measurements made on the highly conducting Langmuir-Blodgett (LB) films of a charge-transfer complex of bis(ethylenedioxy)tetrathiafulvalene (BO) and decyltetracyanoquinodimethane (C10TCNQ), mixed with icosanoic acid, revealed microscopically the metallic nature of the system in a wide temperature range. Further, an anomalous increase in the ESR linewidth was detected around 140 K. To elucidate the origin of this anomaly, in situ ESR experiments upon annealing at low temperatures have been performed. The temperature dependence of the infrared spectrum has been also measured. The obtained results indicate a possible low-temperature phase transition of the present conducting LB system.

AB - The electron spin resonance (ESR) measurements made on the highly conducting Langmuir-Blodgett (LB) films of a charge-transfer complex of bis(ethylenedioxy)tetrathiafulvalene (BO) and decyltetracyanoquinodimethane (C10TCNQ), mixed with icosanoic acid, revealed microscopically the metallic nature of the system in a wide temperature range. Further, an anomalous increase in the ESR linewidth was detected around 140 K. To elucidate the origin of this anomaly, in situ ESR experiments upon annealing at low temperatures have been performed. The temperature dependence of the infrared spectrum has been also measured. The obtained results indicate a possible low-temperature phase transition of the present conducting LB system.

KW - Charge-transfer complex

KW - Conducting organic thin-film

KW - Electron spin resonance

KW - Infrared absorption spectroscopy

KW - Langmuir-Blodgett film

KW - Phase transition

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JF - Thin Solid Films

SN - 0040-6090

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ER -

Possible low-temperature phase transition of Langmuir-Blodgett films of a charge-transfer complex detected by ESR

Abstract

Keywords

ASJC Scopus subject areas

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