Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements

Yu Eltsev, S. Lee, K. Nakao, N. Chikumoto, S. Tajima, N. Koshizuka, M. Murakami

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139 Citations (Scopus)

Abstract

We report on the study of the electronic anisotropy of the MgB2 superconductor using the in-plane resistivity measurements in the magnetic field applied perpendicular and parallel to Mg and B planes of MgB2 single crystals. The results show the temperature dependent anisotropy of the upper critical field with the anisotropy ratio γ = Hc2∥/Hc2⊥ increasing from 2.2 close to Tc up to about 3 below 30 K. Our estimation of the in-plane and out-of-plane coherence length of about ξab(0) = 68 Å and ξc(0) = 23 Å and the electronic mean-free path lab = 240 ̊, and lc = 60 ̊, respectively, indicates MgB2 single crystal approaches the clean limit type-II superconductor.

Original languageEnglish
Article number140501
Pages (from-to)1405011-1405014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number14
Publication statusPublished - 2002 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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