Effects of annealing time and temperature on the transition temperature and low temperature state of AFe2As2 materials

ORAL

Abstract

Over the past couple of years the AFe2As2 (A = Ca, Sr, Ba) family of compounds has become a model system for the study of FeAs-based superconductivity. Superconductivity can be stabilized by hole and electron doping (on A and Fe sites) as well as hydrostatic pressure and isoelectronic substitutions on both the Fe and As sites. In all cases the adequate suppression of the structural / antiferromagnetic phase transition appears to be a necessary condition for the appearance of superconductivity. In this talk we will review the effects of annealing time and temperature on the structural / antiferromagnetic phases of AFe2As2. Transition temperature / time and transition temperature / annealing temperature plots will be presented and discussed.

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Authors

  • Sheng Ran

    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Iowa State University/Ames Lab

  • Sergey Bud'ko

    • Ames Laboratory
    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Iowa State University
    • Iowa State University and Ames Lab.
    • Iowa State University/Ames Lab
    • Iowa State University and Ames Laboratory US DOE
    • Ames Laboratory and Iowa State University, IA, USA
    • Ames Laboratory, Iowa State University

  • Alexander Thaler

    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Iowa State University and Ames Lab.
    • Iowa State University/Ames Lab
    • Department of Physics and Astronomy, Iowa State University and Ames Laboratory, Ames, IA

  • Dominic Ryan

    • Physics Department/McGill University

  • Y. Furukawa

    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory, Dept. of Phys. and Astro., Iowa State Univ.

  • Beas Roy

    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University

  • A. Kreyssig

    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Iowa State University

  • Robert McQueeney

    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University

  • Daniel Pratt

    • Ames Laboratory, USDOE and Iowa State University
    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University

  • A.I. Goldman

    • Ames Laboratory, USDOE and Iowa State University
    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University

  • Paul Canfield

    • Ames Laboratory and Dept. of Physics and Astronomy, Iowa State University
    • Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Iowa State University
    • Iowa State University and Ames Lab.
    • Iowa State University/Ames Lab
    • Iowa State University, Ames Laboratory
    • Ames Laboratory and Iowa State University, IA, USA
    • Ames Laboratory, Ames, IA 50011, U.S.A.
    • Ames Laboratory, Iowa State University