Combined effects of annealing/quenching and transition metal substitution on physical properties of CaFe$_{2}$As$_{2}$

ORAL

Abstract

Our previous work on CaFe$_{2}$As$_{2}$ single crystals grown out of FeAs flux has shown that a process of annealing and quenching can be used as an additional control parameter which can tune the ground state of CaFe$_{2}$As$_{2}$ systematically, in a manner similar to applied pressure. With combined effect of annealing/quenching and transition metal substitution, CaFe$_{2}$As$_{2}$ system offers ready access to the salient low-temperature states associated with Fe-based superconductors: antiferromagnetic/orthorhombic, superconducting, and nonmagnetic/collapsed tetragonal. In this talk we will present systematic studies of the combined effects of annealing/quenching and chemical substitution with various transition metals (Co, Ni, Rh) on the physical properties of CaFe$_{2}$As$_{2}$ and construct phase diagrams for different substitution levels and different annealing/quenching temperatures.

*Supported by the U.S. Department of Energy Basic Energy Sciences under Contract No. DE-AC02-07CH11358.

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Authors

  • Sheng Ran

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

  • Sergey Bud'ko

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

  • Paul Canfield

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