Anisotropic superconducting properties of MgB2 single crystals

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

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In-plane electrical transport properties of MgB2 single crystals grown under a high pressure of 4-6 GPa and temperature of 1400-1700 °C in the Mg-B-N system have been measured. For all specimens we found a sharp superconducting transition around 38.1-38.3 K with ΔTc(10-90%) within 0.2-0.3 K. Estimated resistivity value at 40 K is about 1 μΩ cm and the resistivity ratio ρ(273 K)/ρ(40 K) = 4.9±0.3. Results of measurements in magnetic field up to 5.5 T perpendicular to Mg and B planes (H) and up to 9 T in parallel orientation (H) show temperature dependent anisotropy of the upper critical field with anisotropy ratio γ = Hc2∥/Hc2⊥ increasing from 2.2 close to Tc up to about 3 below 30 K. Strong deviation of the angular dependence of Hc2 from the anisotropic mass model has been also found.

Original languageEnglish
Pages (from-to)61-64
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume378-381
Issue numberPART 1
DOIs
Publication statusPublished - 2002 Oct 1
Externally publishedYes

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Anisotropy
Single crystals
anisotropy
electrical resistivity
single crystals
Transport properties
transport properties
Magnetic fields
deviation
Temperature
temperature
magnetic fields

Keywords

  • Anisotropy
  • MgB
  • Single crystal
  • Upper critical field

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Anisotropic superconducting properties of MgB2 single crystals. / Eltsev, Yu; Lee, S.; Nakao, K.; Chikumoto, N.; Tajima, S.; Koshizuka, N.; Murakami, Masato.

In: Physica C: Superconductivity and its Applications, Vol. 378-381, No. PART 1, 01.10.2002, p. 61-64.

Research output: Contribution to journalArticle

Eltsev, Y, Lee, S, Nakao, K, Chikumoto, N, Tajima, S, Koshizuka, N & Murakami, M 2002, 'Anisotropic superconducting properties of MgB2 single crystals', Physica C: Superconductivity and its Applications, vol. 378-381, no. PART 1, pp. 61-64. https://doi.org/10.1016/S0921-4534(02)01383-7
Eltsev Y, Lee S, Nakao K, Chikumoto N, Tajima S, Koshizuka N et al. Anisotropic superconducting properties of MgB2 single crystals. Physica C: Superconductivity and its Applications. 2002 Oct 1;378-381(PART 1):61-64. https://doi.org/10.1016/S0921-4534(02)01383-7
Eltsev, Yu ; Lee, S. ; Nakao, K. ; Chikumoto, N. ; Tajima, S. ; Koshizuka, N. ; Murakami, Masato. / Anisotropic superconducting properties of MgB2 single crystals. In: Physica C: Superconductivity and its Applications. 2002 ; Vol. 378-381, No. PART 1. pp. 61-64.
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AU - Koshizuka, N.

AU - Murakami, Masato

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