Rare earth substitution in AFe2As2 single crystals

ORAL

Abstract

Synthesis and characterization of aliovalent light rare earth substitutions for alkaline earth atoms are studied in single crystals of FeAs-based compounds with the ThCr2Si2 structure. Electrical resistivity, magnetic susceptibility and structural parameters determined via x-ray and neutron scattering techniques are investigated as a function of chemical pressure and charge doping induced by substitution. Measured physical properties are compared to the effects of external applied pressure on CaFe2As2, known to induce a collapse of the tetragonal unit cell.

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Authors

  • Shanta Saha

    Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, Center for Nano Physics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, University of Maryland at College Park, University of Maryland

  • Nick Butch

    Center for Nanophysics and Advanced Materials, U. of Maryland, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, Center for Nano Physics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, Department of Physics, University of Maryland, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, University of Maryland, Center for Nanophysics \& Advanced Materials and Department of Physics, University of Maryland, College Park, MD 20742, USA

  • Tyler Drye

    Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, Center for Nano Physics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, University of Maryland at College Park

  • Jeff Mcgill

    Center for Nano Physics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD

  • Johnpierre Paglione

    Center for Nanophysics and Advanced Materials, U. of Maryland, University of Maryland, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, Center for Nano Physics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD, Department of Physics, University of Maryland, University of Maryland at College Park, Center for Nanophysics \& Advanced Materials and Department of Physics, University of Maryland, College Park, MD 20742, USA

  • Peter Zavalij

    Department of Chemistry and Biochemistry, University of Maryland, College Park, MD

  • Jeffrey Lynn

    NIST Center for Neutron Research, Gaithersburg, MD, National Institute of Standards and Technology, NIST Center for Neutron Research