Physical properties of Rh substituted CaFe$_{2}$As $_{2}$ tuned by annealing/quenching

ORAL

Abstract

Our previous work on CaFe$_{2}$As$_{2}$ single crystal 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. We have also shown that CaFe$_{2}$As$_{2}$ is very pressure sensitive. Therefore, unlike the BaFe$_{2}$As$_{2}$ system, the effect of 4d transition metal substitution on CaFe$_{2}$As$_{2}$ is expected to be largely different from that of 3d transition metal substitution (e.g. cobalt or nickel substitution). In this talk we will present results of measurements on a Rh substituted CaFe$_{2}$As$_{2}$ system with different annealing/quenching temperatures. Phase diagrams with substitution level and annealing/quenching temperature as independent parameters are constructed and compared with that of other transition metal substitutions.

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

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Authors

  • Sheng Ran

    • Iowa State University, Ames Lab
    • Ames Laboratory/ Iowa State University
    • The Ames Laboratory, Ames, IA 50011, USA
    • Ames Lab, Department of Physics, Iowa State University

  • S.L. Bud'ko

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

  • Paul C. Canfield

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