Large topological hall effect observed in tetragonal Mn2PtSn Heusler thin film

Tetragonal Mn-Pt-Sn Heusler compounds have been of interest because they enable magnetic antiskyrmion phases, which can potentially lead to low energy cost spintronic device applications. We report the synthesis and systematic study of the magnetic and transport properties of magnetron sputtered tetragonal Mn2PtSn thin films on the thermally oxidized Si substrates. We have observed a large topological Hall resistivity up to 0.57 mu Omega cm around 150 K, which is the largest value among the Mn-based metallic materials so far. Moreover, the large topological Hall effect (THE) appears in a very wide temperature range of 10 K-300K in a magnetic field region where the field-dependent Hall resistivity largely deviates from the magnetization. The large THE indicated here may also provide pathways towards realizing the magnetic antiskyrmions in tetragonal Mn2PtSn thin films. Published by AIP Publishing.