Critical Field Anisotropy in “2K-Superconducting State” of Organic Superconductor β-(BEDT-TTF)2I3

Takahiko Sasaki; Naoki Toyota; Masahiko Hasumi; Toshihito Osada; Seiichi Kagoshima; Hiroyuki Anzai; Madoka Tokumoto; Nobumori Kinoshita

doi:10.1143/JPSJ.58.3477

Critical Field Anisotropy in “2K-Superconducting State” of Organic Superconductor β-(BEDT-TTF)₂I₃

Takahiko Sasaki, Naoki Toyota, Masahiko Hasumi, Toshihito Osada, Seiichi Kagoshima, Hiroyuki Anzai, Madoka Tokumoto, Nobumori Kinoshita

IMR - Materials Property Division

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

2 Citations (Scopus)

Abstract

The anisotropy of the upper critical field H_c2 has been measured at ambient pressure on a layered organic superconductor β-(BEDT-TTF)₂I₃ both in the states before and after annealing at 109 K for 120 hours. By annealing, the critical temperature T_c increases from 1.4 to 2.08 K, while the H_c2±plane increases and the anisotropy, H_c2//plane/H_c2±Plane, decreases. The angular dependences of H_c2 for both states are explained in terms of the effective mass model. It is clarified that the enhanced T_c which is ascribed to the annealing-induced configurational orderings of ethylene groups is closely related to the enhanced effective mass in the basal plane.

Original language	English
Pages (from-to)	3477-3480
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	58
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.58.3477
Publication status	Published - 1989

Keywords

Critical field anisotropy
β(BEDT-TTF)I

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title = "Critical Field Anisotropy in “2K-Superconducting State” of Organic Superconductor β-(BEDT-TTF)2I3",

abstract = "The anisotropy of the upper critical field Hc2 has been measured at ambient pressure on a layered organic superconductor β-(BEDT-TTF)2I3 both in the states before and after annealing at 109 K for 120 hours. By annealing, the critical temperature Tc increases from 1.4 to 2.08 K, while the Hc2±plane increases and the anisotropy, Hc2//plane/Hc2±Plane, decreases. The angular dependences of Hc2 for both states are explained in terms of the effective mass model. It is clarified that the enhanced Tc which is ascribed to the annealing-induced configurational orderings of ethylene groups is closely related to the enhanced effective mass in the basal plane.",

keywords = "Critical field anisotropy, β(BEDT-TTF)I",

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T1 - Critical Field Anisotropy in “2K-Superconducting State” of Organic Superconductor β-(BEDT-TTF)2I3

AU - Sasaki, Takahiko

AU - Toyota, Naoki

AU - Hasumi, Masahiko

AU - Osada, Toshihito

AU - Kagoshima, Seiichi

AU - Anzai, Hiroyuki

AU - Tokumoto, Madoka

AU - Kinoshita, Nobumori

PY - 1989

Y1 - 1989

N2 - The anisotropy of the upper critical field Hc2 has been measured at ambient pressure on a layered organic superconductor β-(BEDT-TTF)2I3 both in the states before and after annealing at 109 K for 120 hours. By annealing, the critical temperature Tc increases from 1.4 to 2.08 K, while the Hc2±plane increases and the anisotropy, Hc2//plane/Hc2±Plane, decreases. The angular dependences of Hc2 for both states are explained in terms of the effective mass model. It is clarified that the enhanced Tc which is ascribed to the annealing-induced configurational orderings of ethylene groups is closely related to the enhanced effective mass in the basal plane.

AB - The anisotropy of the upper critical field Hc2 has been measured at ambient pressure on a layered organic superconductor β-(BEDT-TTF)2I3 both in the states before and after annealing at 109 K for 120 hours. By annealing, the critical temperature Tc increases from 1.4 to 2.08 K, while the Hc2±plane increases and the anisotropy, Hc2//plane/Hc2±Plane, decreases. The angular dependences of Hc2 for both states are explained in terms of the effective mass model. It is clarified that the enhanced Tc which is ascribed to the annealing-induced configurational orderings of ethylene groups is closely related to the enhanced effective mass in the basal plane.

KW - Critical field anisotropy

KW - β(BEDT-TTF)I

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Critical Field Anisotropy in “2K-Superconducting State” of Organic Superconductor β-(BEDT-TTF)₂I₃

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Keywords

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