First-order vortex phase transition in κ-type BEDT-TTF organic superconductors

N. Yoneyama; A. Higashihara; T. Sasaki; N. Kobayashi; S. Yamada

doi:10.1016/S0379-6779(02)00262-X

First-order vortex phase transition in κ-type BEDT-TTF organic superconductors

N. Yoneyama, A. Higashihara, T. Sasaki, N. Kobayashi, S. Yamada

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

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

We measured the local magnetization using a micro-Hall probe in a magnetic field perpendicular to the conduction layer to investigate the mixed state of the quasi-two-dimensional organic superconductors κ-(BEDT-TTF)₂Cu(NCS)₂. A sharp magnetization jump was observed in the vicinity of the irreversible temperature (T_irr) below ∼ 80 Oe, demonstrating the first-order phase transition. Meanwhile, much broader step structure above higher magnetic field than 80 Oe appears below T_irr. The magnetic field regime of 80-100Oe is likely to be connected with the second peak line in the magnetic field-temperature phase diagram.

Original language	English
Pages (from-to)	223-224
Number of pages	2
Journal	Synthetic Metals
Volume	133-134
DOIs	https://doi.org/10.1016/S0379-6779(02)00262-X
Publication status	Published - 2003 Mar 13
Event	ISCOM 2001 - Rusutsu, Hokkaido, Japan Duration: 2001 Sept 10 → 2001 Sept 14

Keywords

First-order phase transition
Magnetic measurement
Organic superconductor

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0379-6779(02)00262-X

Cite this

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title = "First-order vortex phase transition in κ-type BEDT-TTF organic superconductors",

abstract = "We measured the local magnetization using a micro-Hall probe in a magnetic field perpendicular to the conduction layer to investigate the mixed state of the quasi-two-dimensional organic superconductors κ-(BEDT-TTF)2Cu(NCS)2. A sharp magnetization jump was observed in the vicinity of the irreversible temperature (Tirr) below ∼ 80 Oe, demonstrating the first-order phase transition. Meanwhile, much broader step structure above higher magnetic field than 80 Oe appears below Tirr. The magnetic field regime of 80-100Oe is likely to be connected with the second peak line in the magnetic field-temperature phase diagram.",

keywords = "First-order phase transition, Magnetic measurement, Organic superconductor",

author = "N. Yoneyama and A. Higashihara and T. Sasaki and N. Kobayashi and S. Yamada",

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doi = "10.1016/S0379-6779(02)00262-X",

language = "English",

volume = "133-134",

pages = "223--224",

journal = "Synthetic Metals",

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note = "ISCOM 2001 ; Conference date: 10-09-2001 Through 14-09-2001",

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TY - JOUR

T1 - First-order vortex phase transition in κ-type BEDT-TTF organic superconductors

AU - Yoneyama, N.

AU - Higashihara, A.

AU - Sasaki, T.

AU - Kobayashi, N.

AU - Yamada, S.

PY - 2003/3/13

Y1 - 2003/3/13

N2 - We measured the local magnetization using a micro-Hall probe in a magnetic field perpendicular to the conduction layer to investigate the mixed state of the quasi-two-dimensional organic superconductors κ-(BEDT-TTF)2Cu(NCS)2. A sharp magnetization jump was observed in the vicinity of the irreversible temperature (Tirr) below ∼ 80 Oe, demonstrating the first-order phase transition. Meanwhile, much broader step structure above higher magnetic field than 80 Oe appears below Tirr. The magnetic field regime of 80-100Oe is likely to be connected with the second peak line in the magnetic field-temperature phase diagram.

AB - We measured the local magnetization using a micro-Hall probe in a magnetic field perpendicular to the conduction layer to investigate the mixed state of the quasi-two-dimensional organic superconductors κ-(BEDT-TTF)2Cu(NCS)2. A sharp magnetization jump was observed in the vicinity of the irreversible temperature (Tirr) below ∼ 80 Oe, demonstrating the first-order phase transition. Meanwhile, much broader step structure above higher magnetic field than 80 Oe appears below Tirr. The magnetic field regime of 80-100Oe is likely to be connected with the second peak line in the magnetic field-temperature phase diagram.

KW - First-order phase transition

KW - Magnetic measurement

KW - Organic superconductor

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U2 - 10.1016/S0379-6779(02)00262-X

DO - 10.1016/S0379-6779(02)00262-X

M3 - Conference article

AN - SCOPUS:0037435242

SN - 0379-6779

VL - 133-134

SP - 223

EP - 224

JO - Synthetic Metals

JF - Synthetic Metals

T2 - ISCOM 2001

Y2 - 10 September 2001 through 14 September 2001

ER -

First-order vortex phase transition in κ-type BEDT-TTF organic superconductors

Abstract

Keywords

ASJC Scopus subject areas

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