Thermoelectric power study of Eu1 - x Lax B6 ( x = 0.0, 0.1, 0.2 )

Hyun Jung Lee, Myoung Hwan Kim, S. H. Park, H. C. Kim, J. Y. Kim, B. K. Cho

Research output: Contribution to journalArticlepeer-review

Abstract

Temperature-dependent thermoelectric power (TEP) was measured in the range of 2 K < T < 300 K for single crystals of Eu1 - x Lax B6 ( x = 0.0, 0.1, and 0.2). For Eu1 - x Lax B6 ( x = 0.0 and 0.1), the TEP shows negative values in the whole temperature range, consistent with the fact that dominant charge carriers in Fermi surface are electrons. However, for Eu1 - x Lax B6 ( x = 0.2 ), a sign change of the TEP from negative to positive value is observed at about 28 K, which is consistent with the sign reversal of Hall resistivity of the same compound. We surmise that the anomalous sign reversal seems to be accompanied by a magnetic transition from ferromagnetic to antiferromagnetic with La doping in Eu1 - x Lax B6.

Original languageEnglish
Pages (from-to)626-627
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
StatePublished - May 1 2006

Keywords

  • Anomalous transport properties
  • Hexaboride
  • Thermoelectric power

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