title: Structure and paramagnetism in weakly correlated Y8Co5.
abstract: We report the basic physical properties of monoclinic Y8Co5 determined by means of magnetic susceptibility, electrical resistivity, and specific heat measurements. The crystal structure of Y8Co5 is monoclinic (P2(1)/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, R(W) = 1.4, is close to that expected for a free electron gas R(W) = 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 Y8Co5.
authors: Faculty of Applied Physics and Mathematics, Gdansk University of Technology, Gdansk, Poland. tomasz.klimczuk@pg.gda.pl
authors: T
authors: T
authors: Klimczuk
authors: V A
authors: VA
authors: Sidorov
authors: A
authors: A
authors: Szajek
authors: M
authors: M
authors: Werwiński
authors: S A J
authors: SA
authors: Kimber
authors: A L
authors: AL
authors: Kozub
authors: D
authors: D
authors: Safarik
authors: J D
authors: JD
authors: Thompson
authors: R J
authors: RJ
authors: Cava