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Two-fluid model of heavy fermion formation and [formula omitted]Knight shift measurements in [formula omitted]

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
310
Issue
2
Identifiers
DOI: 10.1016/j.jmmm.2006.10.054
Keywords
  • Heavy Fermion
  • Muon Spin Relaxation
  • Knight Shift

Abstract

Abstract We analyze μ SR Knight shift data in UBe 13 which show a non-linear K – χ relation or ‘Knight shift’ anomaly. These data are discussed in terms of a two-component susceptibility proposed by Nakatsuji et al., one component corresponding to non-interacting Kondo moments and a second, low-temperature component χ HF ∝ ( 1 - T / T * ) ln ( T * / T ) associated with onset of the heavy fermion state below T * . The data are consistent with this two-fluid scaling law, with T * = 8.9 ± 0.4 K , and are discussed in terms of the Sommerfeld coefficient and related changes in the low-temperature resistivity, specific heat and NMR relaxation rates in UBe 13 .

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