Magnetotransport study of MgB2 superconductor

Jan Mucha, Marek Pȩkala, Jadwiga Szydlowska, Wojciech Gadomski, Jun Akimitsu, Jean François Fagnard, Philippe Vanderbemden, Rudi Cloots, Marcel Ausloos

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Precise magnetotransport studies of heat and charge carriers in polycrystalline MgB2 show that magnetic fields up to 8 T remarkably influence electrical resistivity, thermoelectric power and thermal conductivity. The superconducting transition temperature shifts from 39 K to 19 K at 8 T as observed on electric signals. The temperature transition width is weakly broadened. Electron and phonon contributions to the thermal conductivity are separated and discussed. The Debye temperature calculated from a phonon drag thermoelectric power component is inconsistent with values derived through other effects.

Original languageEnglish
Pages (from-to)1167-1172
Number of pages6
JournalSuperconductor Science and Technology
Volume16
Issue number10
DOIs
Publication statusPublished - Oct 2003
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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