Absence of a long-range ordered magnetic ground state in Pr3 Rh4 Sn13 studied through specific heat and inelastic neutron scattering

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Harikrishnan S NairA M Strydom

Abstract

Signatures of absence of a long-range ordered magnetic ground state down to 0.36 K are observed in magnetic susceptibility, specific heat, thermal/electrical transport and inelastic neutron scattering data of the quasi-skutterudite compound Pr3Rh4Sn13 which crystallizes in the Yb3Rh4Sn13-type structure with a cage-like network of Sn atoms. In this structure, Pr3+ occupies a lattice site with D 2d point symmetry having a ninefold degeneracy corresponding to J  =  4. The magnetic susceptibility of Pr3Rh4Sn13 shows only a weak temperature dependence below 10 K; otherwise remaining paramagnetic-like in the range, 10 K-300 K. From the inelastic neutron scattering intensity of Pr3Rh4Sn13 recorded at different temperatures, we identify excitations at 4.5(7) K, 5.42(6) K, 10.77(5) K, 27.27(5) K, 192.28(4) K and 308.33(3) K through a careful peak analysis. However, no signatures of long-range magnetic order are observed in the neutron data down to 1.5 K, which is also confirmed by the specific heat data down to 0.36 K. A broad Schottky-like peak is recovered for the magnetic part of the specific heat, C 4f, which suggests the role of crystal electric fields of Pr3+ . A crystalline electric field model consisting of 7 levels was applied ...Continue Reading

References

Oct 21, 1996·Physical Review Letters·A YatskarP C Canfield
Apr 24, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Roman GumeniukAndreas Leithe-Jasper
Jan 24, 2015·Physical Review Letters·Masaki TsujimotoSatoru Nakatsuji
Jan 1, 2009·Journal of Research of the National Institute of Standards and Technology·Richard Tumanjong AzuahRobert M Dimeo

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