Magnetotransport study of MgB2 superconductor

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

doi:10.1088/0953-2048/16/10/308

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 journal › Article › peer-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 language	English
Pages (from-to)	1167-1172
Number of pages	6
Journal	Superconductor Science and Technology
Volume	16
Issue number	10
DOIs	https://doi.org/10.1088/0953-2048/16/10/308
Publication status	Published - Oct 2003
Externally published	Yes

ASJC Scopus subject areas

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

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AU - Mucha, Jan

AU - Pȩkala, Marek

AU - Szydlowska, Jadwiga

AU - Gadomski, Wojciech

AU - Akimitsu, Jun

AU - Fagnard, Jean François

AU - Vanderbemden, Philippe

AU - Cloots, Rudi

AU - Ausloos, Marcel

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AB - 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.

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