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, Masato Murakami

Research output: Contribution to journalArticle

136 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

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Anisotropy
Single crystals
anisotropy
Superconducting materials
single crystals
electronics
mean free path
Magnetic fields
electrical resistivity
magnetic fields
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements. / Eltsev, Yu; Lee, S.; Nakao, K.; Chikumoto, N.; Tajima, S.; Koshizuka, N.; Murakami, Masato.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 14, 140501, 01.04.2002, p. 1405011-1405014.

Research output: Contribution to journalArticle

Eltsev, Yu ; Lee, S. ; Nakao, K. ; Chikumoto, N. ; Tajima, S. ; Koshizuka, N. ; Murakami, Masato. / Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 14. pp. 1405011-1405014.
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AU - Koshizuka, N.

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AB - 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.

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