Studies on Single Crystals CePdGa$_{6}$ and Ce$_{2}$PdGa$_{12}$

ORAL

Abstract

Single crystals of tetragonal CePdGa$_{6}$ and Ce$_{2}$PdGa$_{12}$ are found to be antiferromagnetic below a T$_{N}$ of 5 and 12 K respectively, with ordering along the $c$-axis. The electronic specific heat coefficients at T$_{N }$are approximately 350 and 140 (mJ/mole-Ce-K$^{2})$ for CePdGa$_{6}$ and Ce$_{2}$PdGa$_{12}$ respectively, suggesting strong Kondo competition. In addition, a metamagnetic transition can be driven by relatively small magnetic fields applied along the $c$-axis in both systems. Field dependent thermodynamic properties and magnetization data will be presented and the origin of the complex ground states will be discussed. This work was supported by NSF DMR-0433560.

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Authors

  • Long Pham

  • Han-Oh Lee

    Physics Department, University of California Davis, Department of Physics, University of California at Davis, Department of Physics, University of California

  • Satoru Nakasuji

    Physics Department, University of Kyoto, 3Department of Physics, Kyoto University, Department of Physics, Kyoto University

  • Nelson Moreno

    Los Alamos National Laboratory

  • Robin Macaluso

    Department of Chemistry, Louisiana

  • Brad Carter

    2National High Magnetic Field Laboratory, Florida State University, National High Magnetic Field Laboratory, Florida State University

  • Julia Chan

    Department of Chemistry, Louisiana State University, Departmen of Chemistry, Louisiana

  • Peter Klavins

  • Zachary Fisk

    Department of Physics, University of California Davis