Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF)
                        2
                        KHg(SCN)
                        4

M. Koeppen; F. Kromer; M. Lang; F. Steglich; T. Sasaki; Naoki Toyota; H. Tajima

doi:10.1016/S0379-6779(97)81026-0

Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF) ₂ KHg(SCN) ₄

M. Koeppen, F. Kromer, M. Lang, F. Steglich, T. Sasaki, Naoki Toyota, H. Tajima

理学研究科・物理学専攻

研究成果: Conference article › 査読

抄録

High-resolution thermal-expansion measurements on high-quality single crystals of the title compound reveal thermodynamic evidence for a second-order phase transition at T _A = 7.9K. According to the Ehrenfest relation the negative signs of the discontinuities in the coefficient of thermal expansion for directions parallel and perpendicular to the conducting planes correspond to negative uniaxial-pressure dependences of T _A with a predominant effect along the intralayer direction. At a temperature slightly above T _A , i.e. around 12K, measurements perpendicular to the planes reveal indications for a second anomaly which is field-independent for B ≤ 9.5T but shows a peculiar dependence on the thermal history.

本文言語	English
ページ（範囲）	2059-2060
ページ数	2
ジャーナル	Synthetic Metals
巻	86
号	1 -3 pt 3
DOI	https://doi.org/10.1016/S0379-6779(97)81026-0
出版ステータス	Published - 1997 1月 1
イベント	Proceedings of the 1996 International Conference on Science and Technology of Synthetic Metals, ICSM'96. Part 3 (of 3) - Snowbird, UT, USA 継続期間: 1996 7月 28 → 1996 8月 2

ASJC Scopus subject areas

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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10.1016/S0379-6779(97)81026-0

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引用スタイル

Koeppen, M., Kromer, F., Lang, M., Steglich, F., Sasaki, T., Toyota, N., & Tajima, H. (1997). Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF) ₂ KHg(SCN) ₄ Synthetic Metals, 86(1 -3 pt 3), 2059-2060. https://doi.org/10.1016/S0379-6779(97)81026-0

Koeppen, M, Kromer, F, Lang, M, Steglich, F, Sasaki, T, Toyota, N & Tajima, H 1997, ' Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF) ₂ KHg(SCN) ₄ ', Synthetic Metals, vol. 86, no. 1 -3 pt 3, pp. 2059-2060. https://doi.org/10.1016/S0379-6779(97)81026-0

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title = " Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF) 2 KHg(SCN) 4 ",

abstract = " High-resolution thermal-expansion measurements on high-quality single crystals of the title compound reveal thermodynamic evidence for a second-order phase transition at T A = 7.9K. According to the Ehrenfest relation the negative signs of the discontinuities in the coefficient of thermal expansion for directions parallel and perpendicular to the conducting planes correspond to negative uniaxial-pressure dependences of T A with a predominant effect along the intralayer direction. At a temperature slightly above T A , i.e. around 12K, measurements perpendicular to the planes reveal indications for a second anomaly which is field-independent for B ≤ 9.5T but shows a peculiar dependence on the thermal history. ",

author = "M. Koeppen and F. Kromer and M. Lang and F. Steglich and T. Sasaki and Naoki Toyota and H. Tajima",

year = "1997",

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T1 - Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF) 2 KHg(SCN) 4

AU - Koeppen, M.

AU - Kromer, F.

AU - Lang, M.

AU - Steglich, F.

AU - Sasaki, T.

AU - Toyota, Naoki

AU - Tajima, H.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - High-resolution thermal-expansion measurements on high-quality single crystals of the title compound reveal thermodynamic evidence for a second-order phase transition at T A = 7.9K. According to the Ehrenfest relation the negative signs of the discontinuities in the coefficient of thermal expansion for directions parallel and perpendicular to the conducting planes correspond to negative uniaxial-pressure dependences of T A with a predominant effect along the intralayer direction. At a temperature slightly above T A , i.e. around 12K, measurements perpendicular to the planes reveal indications for a second anomaly which is field-independent for B ≤ 9.5T but shows a peculiar dependence on the thermal history.

AB - High-resolution thermal-expansion measurements on high-quality single crystals of the title compound reveal thermodynamic evidence for a second-order phase transition at T A = 7.9K. According to the Ehrenfest relation the negative signs of the discontinuities in the coefficient of thermal expansion for directions parallel and perpendicular to the conducting planes correspond to negative uniaxial-pressure dependences of T A with a predominant effect along the intralayer direction. At a temperature slightly above T A , i.e. around 12K, measurements perpendicular to the planes reveal indications for a second anomaly which is field-independent for B ≤ 9.5T but shows a peculiar dependence on the thermal history.

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DO - 10.1016/S0379-6779(97)81026-0

M3 - Conference article

VL - 86

SP - 2059

EP - 2060

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

IS - 1 -3 pt 3

T2 - Proceedings of the 1996 International Conference on Science and Technology of Synthetic Metals, ICSM'96. Part 3 (of 3)

Y2 - 28 July 1996 through 2 August 1996

ER -

Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF) 2 KHg(SCN) 4

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ASJC Scopus subject areas

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Thermal-expansion studies on the low-T phase diagram of α-(BEDT-TTF) ₂ KHg(SCN) ₄