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

Institute for Materials Research (IMR) (institute affiliation only)

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

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.58.3477

Cite this

Critical Field Anisotropy in “2K-Superconducting State” of Organic Superconductor β-(BEDT-TTF)₂I₃. / Sasaki, Takahiko; Toyota, Naoki; Hasumi, Masahiko; Osada, Toshihito; Kagoshima, Seiichi; Anzai, Hiroyuki; Tokumoto, Madoka; Kinoshita, Nobumori.

In: journal of the physical society of japan, Vol. 58, No. 10, 1989, p. 3477-3480.

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

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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.",

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AU - Osada, Toshihito

AU - Kagoshima, Seiichi

AU - Anzai, Hiroyuki

AU - Tokumoto, Madoka

AU - Kinoshita, Nobumori

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