Superconducting fluctuation in Ba2[Y,Ln]Cu3O7 measured by magnetoresistance

Azusa Matsuda, Takao Ishii, Kyoichi Kinoshita, Tomoaki Yamada

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Magnetoresistance of polycrystalline Ba2YCu3O7 and Ba2Y1-xLnxCu3O7 (Ln=Pr,Ho,Gd, or Eu) are measured from Tc to 230 K. All the samples show large positive magnetoresistance arising from superconducting fluctuation. The temperature dependence is well-described by the recently developed theory which includes the Zeeman contribution of the Maki-Thompson-term. in pure samples, the coherence lengths along the ab axis and c axis are 12 Å and 2 Å, respectively. The phase relaxation time is estimated to be 2×10-13 sec at 100 K. Only Pr substitution shortens the phase relaxation time, indicating the pair breaking nature of the Pr ion.

Original languageEnglish
Pages (from-to)371-372
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume162-164
Issue numberPART 1
DOIs
Publication statusPublished - 1989 Dec
Externally publishedYes

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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