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 journalConference articlepeer-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 languageEnglish
Pages (from-to)607-608
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume388-389
DOIs
Publication statusPublished - May 2003
Externally publishedYes
Eventproceedings of the 23rd international conference on low temper - Hiroshima, Japan
Duration: Aug 20 2002Aug 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

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