Magnetic Properties of Topological Material Candidate EuZnBi 2

The single crystals of the topological material candidate EuZnBi _2 have been grown using flux method, and the magnetic properties have been systematically investigated. Crystal structure analysis confirms that EuZnBi _2 crystallizes in a layered tetragonal structure at room temperature, consisting of alternating ZnBi _4 tetrahedral and Bi planar layers, separated by Eu atoms. The direct current (DC) magnetic susceptibility, alternating current (AC) magnetic susceptibility, and specific heat measurements indicate that a long-range antiferromagnetic order of Eu ^2+ develops at T _N = 20 K and the magnetic easy axis exists in the layers. It is interesting to note that EuZnBi _2 exhibits a magnetic anomaly below T _N , which might be associated with the tilting of Eu moments and spin reorientation.