Metamagnetic transition in UCoAl probed by thermoelectric measurements

A. Palacio-Morales, A. Pourret, G. Knebel, T. Combier, D. Aoki, H. Harima, J. Flouquet

研究成果: Article査読

14 被引用数 (Scopus)

抄録

We report field and temperature dependent measurements of the thermoelectric power (TEP) and the Nernst effect in the itinerant metamagnet UCoAl. The magnetic field is applied along the easy magnetization c axis in the hexagonal crystal structure. The metamagnetic transition from the paramagnetic phase at zero field to the field induced ferromagnetic state is of first order at low temperatures and becomes a broad crossover above the critical temperature TM 11 K. The field dependence of the TEP reveals that the effective mass of the hole carriers changes significantly at the metamagnetic transition. The TEP experiment reflects the existence of different carrier types in good agreement with band structure calculations and previous Hall effect experiments. According to the temperature dependence of the TEP, no Fermi liquid behavior appears in the paramagnetic state down to 150 mK, but is achieved only in the field induced ferromagnetic state.

本文言語English
論文番号116404
ジャーナルPhysical review letters
110
11
DOI
出版ステータスPublished - 2013 3 12

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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