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