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
Externally publishedYes

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Magnetoresistance
Relaxation time
relaxation time
Substitution reactions
Ions
substitutes
temperature dependence
ions
Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Superconducting fluctuation in Ba2[Y,Ln]Cu3O7 measured by magnetoresistance. / Matsuda, Azusa; Ishii, Takao; Kinoshita, Kyoichi; Yamada, Tomoaki.

In: Physica C: Superconductivity and its Applications, Vol. 162-164, No. PART 1, 1989, p. 371-372.

Research output: Contribution to journalArticle

Matsuda, Azusa ; Ishii, Takao ; Kinoshita, Kyoichi ; Yamada, Tomoaki. / Superconducting fluctuation in Ba2[Y,Ln]Cu3O7 measured by magnetoresistance. In: Physica C: Superconductivity and its Applications. 1989 ; Vol. 162-164, No. PART 1. pp. 371-372.
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