Transport properties of Y1-xNdxCo2 compounds

K. Uchima, M. Takeda, C. Zukeran, A. Nakamura, N. Arakaki, S. Komesu, Y. Takaesu, M. Hedo, T. Nakama, K. Yagasaki, Y. Uwatoko, A. T. Burkov

Research output: Contribution to journalConference article

Abstract

Electrical resistivity ρ and thermopower S of light rare earth-based pseudo-binary Y1-xNdxCo2 alloys have been measured at temperatures from 2 K to 300 K and under pressures up to 3.5 GPa. The Curie temperature of the alloys, TC, determined from characteristic features in the temperature dependences of the transport properties, decreases with decreasing Nd concentration x and vanishes around xC = 0.3. The residual resistivity has a pronounced maximum at x = xC. The temperature coefficient of thermopower dS/dT at low temperature limit shows a complex dependence on alloy composition: it changes its sign from negative to positive at x ≈ 0.2, having a maximum at x = x C, and is nearly composition independent at x > 0.5. The pressure dependences of TC and ρ0 of Yo.6Ndo. 4Co2 reveal the behavior similar to that observed in the Y1-xRxHCo2 (RH = heavy rare earth) alloy systems, which implies that the magnetic state of the Co-3d electron subsystem is responsible for the transport properties in the Y 1-xNdxCo2 alloys.

Original languageEnglish
Article number032107
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 3
DOIs
Publication statusPublished - 2012 Jan 1
Externally publishedYes
Event26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China
Duration: 2011 Aug 102011 Aug 17

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Uchima, K., Takeda, M., Zukeran, C., Nakamura, A., Arakaki, N., Komesu, S., Takaesu, Y., Hedo, M., Nakama, T., Yagasaki, K., Uwatoko, Y., & Burkov, A. T. (2012). Transport properties of Y1-xNdxCo2 compounds. Journal of Physics: Conference Series, 400(PART 3), [032107]. https://doi.org/10.1088/1742-6596/400/3/032107