Distinct Composition-Dependent Topological Hall Effect in Mn2-xZnxSb
arxiv(2024)
摘要
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.
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