by varying growth conditions and doping*

EuCd₂As₂ is predicted to host a pair of Weyl points, and Weyl cone like features which may arise from ferromagnetic fluctuations have been observed. [1,2] Here, we present the synthesis details and characterization of single crystals of EuCd₂As₂ that, with varying initial stoichiometries, can be tuned from an antiferromagnetic ground state (T_N ~ 9.5 K) to a ground state with a clear ferromagnetic component (T_C ~ 30 K). [3] We have further attempted to understand this variation in magnetic behavior by doping Na on the Eu site. Magnetization, magneto-optical Kerr rotation, specific heat and resistivity data will be presented and discussed.
1. Wang, L.-L. et. al., Phys. Rev. B 99, 245147 (2019).
2. Ma, J.-Z. et. al., Science Advances, Vol. 5, no. 7, (2019)
3. Jo, N. H. et. al., Phys. Rev. B 101, 140402(R) (2020).