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).
[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).
*This work was carried out at Iowa State University and supported by Ames Laboratory, US DOE, under Contract No. DEAC0207CH11358 and the Center for Advancement of Topological Semimetals, an Energy Frontier Research Center funded by the U.S. DOE, Office of Basic Energy Sciences and by the Gordon and Betty Moore Foundation (NHJ).
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Presenters
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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