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    Please use this identifier to cite or link to this item: https://ir.fy.edu.tw:8080/ir/handle/987654321/1057


    Title: Annealing Effect on the Physical Properties of UAu2Si2
    Authors: K. J. Lin, J. S. Hwang, C. S. Wur, R. Hsu & C. Tien
    Contributors: 輔英科技大學 共同教育中心 自然科學組
    Keywords: A. magnetically ordered materials;D. heat capacity;D. heavy fermions;D. phase transitions
    Date: 1997-03-01
    Issue Date: 2010-09-24 13:56:52 (UTC+8)
    Abstract: We have investigated the effects of annealing on the uranium intermetallic compound UAu2Si2. The physical properties of both the annealed and as-cast samples were studied from 5 to 300 K. Both the resistivity varrho(T) and low-field magnetic susceptibility χ(T) of the as-cast sample show anomalies at 18 K and at 82 K; whereas the heat capacity C(T) shows only an anomaly at 20.5 K. The varrho(T) and χ(T) of the annealed sample displays a low-temperature anomaly around 20 K; and a complex magnetic phase transition between 48 K and 55 K was observed. A sharp anomaly of C(T) in the annealed UAu2Si2 can be seen at 21.5 K. The annealed sample shows Fermi-liquid behavior below 10 K with a coefficient of the quadratic term in the temperature dependence of the resistivity being 11.5 μΩ-cm K−2. The low temperature electronic specific heat coefficient γ of the annealed sample is 92 mJ mol K−2. We infer that UAu2Si2 has heavy-fermion behavior with ferromagnetic ground state, which is an uncommon behavior in the uranium intermetallic compounds.
    Relation: Solid State Communications 103(3),185-188
    Appears in Collections:[自然科學組] 期刊論文

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