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.

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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