Specific heat of Pr1-xNdxOs4Sb12

ORAL

Abstract

Filled skutterudites are the compounds that show the formula RM4X12. R is the rare earth metal, M is the transition metal, and X is the pnictogen. They will show rich varieties of strongly correlated electron behaviors, which attract our interest. The sample we focus on is a doping system, Pr1-xNdxOs4Sb12. PrOs4Sb12 show unconventional superconductivity, while NdOs4Sb12 exhibit ferromagnetism at low temperature. Therefore, there is a competition between two properties. In order to understand the compound better, we do the heat capacity measurement from 11K to 300K. From the curve of the specific heat of Pr1-xNdxOs4Sb12, parameters can be extracted out by the curve fitting with a combination of the Debye, Einstein, and Sommerfeld models. These parameters include Debye temperature, Einstein temperature, and electronic specific heat coefficient and can show the properties of the materials, such as the stiffness of the crystal structure, the rattling effect of the rare earth metal, and electron correlation. From the data analysis, we try to find out the trend of parameters depending on Nd concentration.

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Presenters

  • Yeh-Chia Chang

    California State University, Fresno

Authors

  • Yeh-Chia Chang

    California State University, Fresno

  • Shoji D Hishida

    California State University, Fresno, Physics, California State University, Fresno

  • Pei-Chun Ho

    California State University, Fresno

  • M Brian Maple

    University of California, San Diego, Department of Physics, University of California, San Diego, La Jolla, CA 92093, Department of Physics, University of California, San Diego, UC San Diego, Physics, University of California, San Diego, Department of Physics, University of California, San Diego, CA 92093, USA, Physics, University of California, SanDiego

  • Tatsuya Yanagisawa

    Department of Physics, Hokkaido University, Sapporo 060-0810, Japan, Hokkaido University, Physics, Hokkaido University