Structural design and magneto-transport properties of intergrowth compound Eu₂CuZn₂Sb₃

The magnetic topological materials have the potential to serve as next-generation information carriers, enabling high-density and low-power memory. A promising strategy for designing such materials is to integrate structural units with strongly correlated magnetic orders and topological properties. By stacking units derived from helical magnet EuCuSb (hexagonal) and the magnetic topological material EuZn₂Sb₂ (trigonal), we synthesized a new layered quaternary compound Eu₂CuZn₂Sb₃. Eu₂CuZn₂Sb₃ shows dominant in-plane magnetic correlations at 10 K, mainly originating from the EuZn₂Sb₂ structural units, while long-range antiferromagnetic order develops at 5 K. The compound exhibits first-order-like metamagnetic response under magnetic fields, associated with the EuCuSb structural units. The electronic transport reveals typical metallic behavior, with a pronounced peak anomaly in resistivity near 10 K that is strongly suppressed by magnetic fields. Furthermore, Hall effect measurements confirm the dominance of the ordinary Hall effect contribution. This work reports on the novel layered antimonide Eu₂CuZn₂Sb₃, providing initial insights into its magnetism and magneto-transport properties. These results demonstrate that the modular block-layer design offers a versatile and effective route for exploring magnetic topological materials.