• Lattice specific heat and local density of states of Ni-based dilute alloys at low temperature

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      https://www.ias.ac.in/article/fulltext/pram/066/06/1077-1092

    • Keywords

       

      Lattice specific heat; local density of states; dilute alloys; resonance modes; Green’s function; force-constant; substitutional impurity

    • Abstract

       

      A detailed theoretical study of the low-temperature lattice specific heat of Ni-based dilute alloys has been carried out. Lattice Green’s function method has been used to calculate the local density of states of substitutional impurities and lattice specific heat in different alloys. The resonance condition has been investigated for possible occurrence of resonance modes. Except in NiCr and NiMn, low-frequency resonance modes have been obtained in all the alloys. However, no localized mode was obtained. The impurity-induced increase in lattice specific heat is explained on the basis of the obtained resonance modes. The calculation shows an excellent agreement with the measured lattice specific heat in these alloys

    • Author Affiliations

       

      P D Semalty1 Kapil Dev1 P N Ram2

      1. Department of Physics, H N B Garhwal University Campus, Badshahithaul, Tehri-Garhwal - 249 199, India
      2. Department of Physics, Institute of Engineering and Technology, M P J Rohilkhand University, Bareilly - 243 006, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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