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Stabilizing ferromagnetism in the Weyl semimetal candidate EuCd<sub>2</sub>As<sub>2</sub>

ORAL

Abstract

EuCd2As2 is predicted to host a variety of topological features in its band structure depending on its magnetic ground state. A ferromagnetic state with spins oriented along the crystallographic c axis is expected to have a single pair of Weyl points near the Fermi energy. [1] Previously published work on EuCd2As2 report it to have an antiferromagnetic ground state. [2,3] Here, we present the synthesis and characterization of single crystals of EuCd2As2 that, with varying initial stoichiometries, can be tuned from an antiferromagnetic ground state (TN ~ 9.5 K) to a ground state with a clear ferromagnetic component (TC ~ 30 K). Measurements of magnetization, magneto-optical Kerr rotation, specific heat and resistivity will be presented and discussed.

[1] Wang et. al., PRB 99, 245147 (2019).
[2] Rahn et al., PRB 97, 214422 (2018).
[3] Schellenberg et. al., Z. Anorg. Allg. Chem. 637, 1863–1870 (2011).

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Presenters

  • Brinda Kuthanazhi

    Ames Laboratory, Iowa State University, Iowa State University, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory

Authors

  • Brinda Kuthanazhi

    Ames Laboratory, Iowa State University, Iowa State University, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory

  • Na Hyun Jo

    Iowa State University, Ames Laboratory, Iowa State University, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Iowa State University/Ames Laboratory

  • Yun Wu

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory

  • Tae-Hoon Kim

    Ames Laboratory

  • Lin Zhou

    Ames Laboratory

  • Erik I Timmons

    Ames Lab, Iowa State University/Ames Laboratory

  • Lin-Lin Wang

    Ames Lab, Ames Laboratory, Department of Physics and Astronomy, Iowa State University/Ames Laboratory

  • Andriy Palasyuk

    Ames Laboratory

  • Kyungchan Lee

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory

  • Benjamin Schrunk

    Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory

  • Benjamin Ueland

    Ames Laboratory, Ames, IA 50011, USA, Division of Materials Science & Engineering, Ames Laboratory, Ames Laboratory, Ames Lab

  • Anton Burkov

    University of Waterloo, Department of Physics and Astronomy, University of Waterloo

  • Ruslan Prozorov

    Ames Lab, Ames laboratory, Ames, IA, Ames Laboratory, Ames Laboratory and Iowa state University, Ames, USA, Iowa State University/Ames Laboratory

  • Sergey L. Bud'ko

    Iowa State University, Ames Laboratory and Iowa State University, Ames Lab, Ames laboratory, Ames, IA, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Ames Laboratory, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Iowa State University and Ames Laboratory, Iowa State University, Ames Laboratory, Division of Materials Sciences & Engineering, Ames Lab and Iowa State University, Iowa State University/Ames Laboratory

  • Adam Kaminski

    Physics and Astronomy, Iowa State University, Ames Laboratory, Iowa State University, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory

  • Paul C Canfield

    Iowa State University, Ames Laboratory and Iowa State University, Ames Lab, Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA, Ames laboratory, Ames, IA, Ames Laboratory, Iowa State University, Department of Physics & Astronomy, Iowa State University/Ames Laboratory, Department of Physics and Astronomy, Iowa State University/Ames Laboratory, Iowa State University and Ames Laboratory, Iowa State University, Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Division of Materials Sciences & Engineering, Ames Lab and Iowa State University, Department of Physics and Astronomy, Ames Laboratory/Iowa State Univeristy, Iowa State University/Ames Laboratory