Distinct Composition-Dependent Topological Hall Effect in Mn2-xZnxSb

Abstract

Spintronics, an evolving interdisciplinary field at the intersection of magnetism and electronics, explores innovative applications of electron charge and spin properties for advanced electronic devices. The topological Hall effect, a key component in spintronics, has gained significance due to emerging theories surrounding noncoplanar chiral spin textures. This study focuses on Mn2-xZnxSb, a material crystalizing in centrosymmetric space group with rich magnetic phases tunable by Zn contents. Through comprehensive magnetic and transport characterizations, we found that the high-Zn (x>0.6) samples display THE which is enhanced with decreasing temperature, while THE in the low-Zn (x<0.6) samples show an opposite trend. The coexistence of those distinct temperature dependences for THE suggests very different magnetic interactions/structure for different compositions and underscores the strong coupling between magnetism and transport in Mn2-xZnxSb. Our findings contribute to understanding topological magnetism in centrosymmetric tetragonal lattices, establishing Mn2-xZnxSb as a unique platform for exploring tunable transport effects and opening avenues for further exploration in the realm of spintronics.