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Condensed Matter > Strongly Correlated Electrons

arXiv:1105.4277 (cond-mat)
[Submitted on 21 May 2011 (v1), last revised 11 Oct 2011 (this version, v2)]

Title:Structural, electronic, magnetic, and thermal properties of single-crystalline UNi0.5Sb2

Authors:M. S. Torikachvili, B. K. Davis, K. Kothapalli, H. Nakotte, A. J. Schultz, E. D. Mun, S. L. Bud'ko
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Abstract:We studied the properties of the antiferromagnetic (AFM) UNi0.5Sb2 (TN \approx 161 K) compound in Sb-flux grown single crystals by means of measurements of neutron diffraction, magnetic susceptibility ({\chi}), specific heat (Cp), thermopower (S), thermal conductivity ({\kappa}), linear thermal expansion ({\Delta}L/L), and electrical resistivity ({\rho}) under hydrostatic pressures (P) up to 22 kbar. The neutron diffraction measurements revealed that the compound crystallizes in the tetragonal P42/nmc structure, and the value of the U-moments yielded by the histograms at 25 K is \approx 1.85 \pm 0.12 {\mu}B/U-ion. In addition to the features in the bulk properties observed at TN, two other hysteretic features centered near 40 and 85 K were observed in the measurements of {\chi}, S, {\rho}, and {\Delta}L/L. Hydrostatic pressure was found to raise TN at the rate of \approx 0.76 K/kbar, while suppressing the two low temperature features. These features are discussed in the context of Fermi surface and hybridization effects.
Comments: 17 pages, 8 figures
Subjects: Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1105.4277 [cond-mat.str-el]
  (or arXiv:1105.4277v2 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.1105.4277
Related DOI: https://doi.org/10.1103/PhysRevB.84.205114

Submission history

From: Milton Torikachvili [view email]
[v1] Sat, 21 May 2011 17:59:49 UTC (2,409 KB)
[v2] Tue, 11 Oct 2011 17:24:26 UTC (2,420 KB)
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