Magnetic properties of structure-disordered heavy fermion Ce-Ru alloys

Y. Amakai, S. Murayama, Y. Obi, H. Takano, N. Momono, K. Takanashi

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6 Citations (Scopus)

Abstract

We have analyzed the magnetic susceptibility on sputtered structure-disordered (a-) CexRu100-x alloys for 15 ≤ x ≤ 80 from 1.8 to 280 K published previously. The magnetic susceptibility χ for x ≥ 39 shows a typical Curie-Weiss paramagnetic behavior in the measurement temperature region. The effective magnetic moment peff is about 1.8 μB for x 80 and decreases rapidly with decreasing the Ce-concentration (peff 0.16 μB/Ce-atom, for x 39). The Weiss temperature θ for the Ce-rich side shows a negative value and the absolute value decreases with decreasing the Ce-concentration. The χ for x < 23 has a very small Curie-Weiss term above 4 K and a large diamagnetic susceptibility has been observed below 4 K, suggesting the superconductivity (Tc 3.4 K for x 15). The superconducting transition temperature Tc increases linearly with decreasing the Ce-concentration as shown in the previous resistivity measurement.

Original languageEnglish
Article number042004
JournalJournal of Physics: Conference Series
Volume150
Issue number4
DOIs
Publication statusPublished - 2009 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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