Pinning anomalies in organic layered superconductor κ -(BEDT-TTF)2X {X = Cu(NCS)2, Cu[N(CN)2]Br}

Shigeru Kasahara; Fumitoshi Tateishi; Hiroyuki Caneko; Takashi Hara; Yutaka Nishio; Koji Kajita

doi:10.1016/S0921-4534(02)02763-6

Pinning anomalies in organic layered superconductor κ -(BEDT-TTF)₂X {X = Cu(NCS)₂, Cu[N(CN)₂]Br}

Shigeru Kasahara, Fumitoshi Tateishi, Hiroyuki Caneko, Takashi Hara, Yutaka Nishio, Koji Kajita

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

Abstract

Vortices in organic superconductor κ-(BEDT-TTF)₂X {X = Cu(NCS)₂, Cu[N(CN)₂]Br} are interesting for their anisotropic character. To investigate their dynamical behavior, ac complex susceptibility and dc electrical resistance measurements were done in the presence of vortices introduced by dc magnetic fields. In the course of experiments, we found that the dc field dependence of complex susceptibility changes drastically for moderate ac magnetic fields, i.e. the shielding effect of the system (-χ′) has a peak structure and the dissipation term (χ″) shows a dip. In addition to the anomalies in the susceptibility, it turned out that the electrical resistance has a dip structure under the same dc magnetic fields. These anomalies imply that the vortices are less mobile there.

Original language	English
Pages (from-to)	607-608
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02763-6
Publication status	Published - May 2003
Externally published	Yes
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: Aug 20 2002 → Aug 27 2002

Keywords

Complex susceptibility
Flow resistance
Organic superconductor
Vortex dynamics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(02)02763-6

Cite this

Pinning anomalies in organic layered superconductor κ -(BEDT-TTF)₂X {X = Cu(NCS)₂, Cu[N(CN)₂]Br}. / Kasahara, Shigeru; Tateishi, Fumitoshi; Caneko, Hiroyuki; Hara, Takashi; Nishio, Yutaka; Kajita, Koji.

In: Physica C: Superconductivity and its applications, Vol. 388-389, 05.2003, p. 607-608.

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

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title = "Pinning anomalies in organic layered superconductor κ -(BEDT-TTF)2X {X = Cu(NCS)2, Cu[N(CN)2]Br}",

abstract = "Vortices in organic superconductor κ-(BEDT-TTF)2X {X = Cu(NCS)2, Cu[N(CN)2]Br} are interesting for their anisotropic character. To investigate their dynamical behavior, ac complex susceptibility and dc electrical resistance measurements were done in the presence of vortices introduced by dc magnetic fields. In the course of experiments, we found that the dc field dependence of complex susceptibility changes drastically for moderate ac magnetic fields, i.e. the shielding effect of the system (-χ′) has a peak structure and the dissipation term (χ″) shows a dip. In addition to the anomalies in the susceptibility, it turned out that the electrical resistance has a dip structure under the same dc magnetic fields. These anomalies imply that the vortices are less mobile there.",

keywords = "Complex susceptibility, Flow resistance, Organic superconductor, Vortex dynamics",

author = "Shigeru Kasahara and Fumitoshi Tateishi and Hiroyuki Caneko and Takashi Hara and Yutaka Nishio and Koji Kajita",

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TY - JOUR

T1 - Pinning anomalies in organic layered superconductor κ -(BEDT-TTF)2X {X = Cu(NCS)2, Cu[N(CN)2]Br}

AU - Kasahara, Shigeru

AU - Tateishi, Fumitoshi

AU - Caneko, Hiroyuki

AU - Hara, Takashi

AU - Nishio, Yutaka

AU - Kajita, Koji

PY - 2003/5

Y1 - 2003/5

N2 - Vortices in organic superconductor κ-(BEDT-TTF)2X {X = Cu(NCS)2, Cu[N(CN)2]Br} are interesting for their anisotropic character. To investigate their dynamical behavior, ac complex susceptibility and dc electrical resistance measurements were done in the presence of vortices introduced by dc magnetic fields. In the course of experiments, we found that the dc field dependence of complex susceptibility changes drastically for moderate ac magnetic fields, i.e. the shielding effect of the system (-χ′) has a peak structure and the dissipation term (χ″) shows a dip. In addition to the anomalies in the susceptibility, it turned out that the electrical resistance has a dip structure under the same dc magnetic fields. These anomalies imply that the vortices are less mobile there.

AB - Vortices in organic superconductor κ-(BEDT-TTF)2X {X = Cu(NCS)2, Cu[N(CN)2]Br} are interesting for their anisotropic character. To investigate their dynamical behavior, ac complex susceptibility and dc electrical resistance measurements were done in the presence of vortices introduced by dc magnetic fields. In the course of experiments, we found that the dc field dependence of complex susceptibility changes drastically for moderate ac magnetic fields, i.e. the shielding effect of the system (-χ′) has a peak structure and the dissipation term (χ″) shows a dip. In addition to the anomalies in the susceptibility, it turned out that the electrical resistance has a dip structure under the same dc magnetic fields. These anomalies imply that the vortices are less mobile there.

KW - Complex susceptibility

KW - Flow resistance

KW - Organic superconductor

KW - Vortex dynamics

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JO - Physica C: Superconductivity and its Applications

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