Field-induced magnetic phase transitions and the resultant giant anomalous Hall effect in the antiferromagnetic half-Heusler compound DyPtBi
Heda Zhang, Yang Lin Zhu, Yiming Qiu, Wei Tian, Huibo Cao, Zhiqiang Mao, Xianglin Ke
Abstract
We report field-induced magnetic phase transitions and transport properties of antiferromagnetic DyPtBi. We show that DyPtBi hosts a delicate balance between two different magnetic ground states, which can be controlled by a moderate magnetic field. Furthermore, it exhibits giant anomalous Hall effect $({\ensuremath{\sigma}}^{A}=1540\phantom{\rule{4pt}{0ex}}{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}1}\phantom{\rule{4pt}{0ex}}\mathrm{c}{\mathrm{m}}^{\ensuremath{-}1},\phantom{\rule{4pt}{0ex}}{\ensuremath{\theta}}_{\mathrm{AHE}}=24%)$ in a field-induced type-I spin structure, presumably attributed to the enhanced Berry curvature associated with avoided band crossings near the Fermi energy and/or nonzero spin chirality. The latter mechanism points DyPtBi towards a rare potential realization of anomalous Hall effect in an antiferromagnet with face-centered-cubic lattice that was proposed in [Physical Review Letters 87, 116801 (2001)].