Magnetothermal conductivity of ErAl2 for cryogenic applications

The thermal conductivity K of rare-earth intermetallic compounds with magnetic ordering temperatures T0 below 100 K is a key parameter affecting their use in magnetic refrigerators and regenerators. We have measured the thermal conductivity of ErAl2, T0=12 K, between 5 and 170 K in 0- and 7-T applie...

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Veröffentlicht in:Journal of applied physics 1988-04, Vol.63 (8), p.4294-4296
Hauptverfasser: ZIMM, C. B, CAMPENNI, C. K, BARCLAY, J. A
Format: Artikel
Sprache:eng
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Zusammenfassung:The thermal conductivity K of rare-earth intermetallic compounds with magnetic ordering temperatures T0 below 100 K is a key parameter affecting their use in magnetic refrigerators and regenerators. We have measured the thermal conductivity of ErAl2, T0=12 K, between 5 and 170 K in 0- and 7-T applied magnetic fields. The zero-field results show a strong, 20-K-wide minimum in the thermal conductivity near the ordering temperature. The results at 7 T indicate that the magnetic field eliminates the minimum and produces a monotonic temperature dependence. We attribute these effects to magnetic scattering of electrons.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.340206