Structure and paramagnetism in weakly correlated Y8Co 5

T. Klimczuk, V. A. Sidorov, A. Szajek, M. Werwiński, S. A.J. Kimber, A. L. Kozub, D. Safarik, J. D. Thompson, Robert Joseph Cava

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

We report the basic physical properties of monoclinic Y8Co 5 determined by means of magnetic susceptibility, electrical resistivity, and specific heat measurements. The crystal structure of Y 8Co5 is monoclinic (P21/c) with lattice parameters a = 7.0582(6) Å, b = 7.2894(6) Å, c = 24.2234(19) Å, and β = 102.112(6)° as refined by using synchrotron powder x-ray diffraction data. The compound shows temperature independent paramagnetism with χ0 = 2.1 × 10-3 emu mol-1 and Sommerfeld parameter γ = 63 mJ mol-1 K-2. The calculated Wilson ratio for Y8Co5, RW = 1.4, is close to that expected for a free electron gas RW = 1. Low temperature resistivity under high pressure does not reveal superconductivity in this compound down to 1.2 K, up to hydrostatic pressures of 5.56 GPa. Band structure calculations (full-potential linearized augmented plane wave, FP-LAPW) derive the Stoner exchange interaction parameter S = 0.24, excluding magnetic behavior for Y 8Co5.

Original languageEnglish (US)
Article number125701
JournalJournal of Physics Condensed Matter
Volume25
Issue number12
DOIs
StatePublished - Mar 27 2013

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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