Study of CaK(Fe1-xAx)4As4 (A = Mn and Cr) single crystals

ORAL

Abstract

Stoichiometric CaKFe4As4 is a Fe-based superconductor which has a critical temperature at 35 K. Substituting Fe with Ni or Co suppresses superconductivity and stabilizes an unusual hedgehog spin-vortex crystal magnetic structure [1]. There is a range of concentrations where superconductivity and magnetism coexist [2,3,4]. Having in mind different effect of [Fe, Co] and [Mn, Cr] substitutions in BaFe2As2, we grew single crystals of CaK(Fe1-xAx)4As4 (A = Cr and Mn) and characterized them by magnetic and transport measurements. Phase diagrams of CaK(Fe1-xAx)4As4 (A = Fe, Co, Mn, Cr) will be compared and the observed trends will be discussed in the context of Fe-based superconductors.
[1] W. R. Meier, et al., npj Quant. Mat. 3, 5 (2018).
[2] S. L. Bud'ko, et al., arXiv1810.07084v1 (2018).
[3] A. Kreyssig, et al., Phys. Rev. B 97, 224521 (2018).
[4] Q.-P. Ding, et al., Phys. Rev. Lett. 121, 137204 (2018).

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Presenters

  • Mingyu Xu

    Ames Laboratory, Iowa State University, Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ., Ames Laboratory & Iowa State University, Iowa State University and Ames Laboratory

Authors

  • Mingyu Xu

    Ames Laboratory, Iowa State University, Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ., Ames Laboratory & Iowa State University, Iowa State University and Ames Laboratory

  • William Meier

    Ames Laboratory and Dept. of Physics, Iowa State University, Ames Laboratory, Iowa State University, Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ., Iowa State University and Ames Laboratory, Ames Laboratory & Department of Physics, Iowa State University

  • Li Xiang

    Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA, Ames Laboratory/Iowa State University, Physics, Iowa State University/Ames Laboratory, Iowa State University and Ames Laboratory

  • Sergey Budko

    Iowa State University, Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA, Ames Laboratory, Iowa State University, Ames Laboratory/Iowa State University, Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ., Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA, Ames Lab & Dept of Physics and Astronomy, Iowa State University, Physics, Iowa State University/Ames Laboratory, Iowa State University and Ames Laboratory

  • Paul Canfield

    Ames Laboratory and Dept. of Physics, Iowa State University, Ames Laboratory, U.S. DOE, Iowa State University, Ames, Iowa 50011, USA., Ames Laboratory, Iowa State University, Department of Physics, Iowa State University, Ames Laboratory, Ames, Iowa 50011, USA, Ames Laboratory, Iowa State University, Ames Laboratory/Iowa State University, Iowa State University and Ames Laboratory, Ames Laboratory and Iowa State University, Ames, IA, USA, Ames Laboratory and Dept. of Phys. and Astro.,, Iowa State Univ., Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA, Ames Lab & Dept of Physics and Astronomy, Iowa State University, Department of Physics & Astronomy, Iowa State University, Department of physics and astronomy, Iowa State University/Ames Laboratory, Physics, Iowa State University/Ames Laboratory, Ames Laboratory & Iowa State University, Physics, Iowa State University