Magnetotransport properties of Cr1-delta Te thin films with strong perpendicular magnetic anisotropy

P-type ferromagnetic Cr1-delta Te thin films with the Curie temperature of 170K were epitaxially grown on GaAs substrate. Low-temperature magnetotransport study reveals that the film has a strong perpendicular magnetic anisotropy (PMA) and an anisotropic magnetoresistance (AMR) ratio up to 8.1%. Furthermore, reduced anomalous Hall effect is observed at low temperatures in Cr1-delta Te, suggesting the possible crossover of the contribution to AHE from the intrinsic mechanism to extrinsic skew scattering. Distinctive from conventional transition metal ferromagnets, the AMR ratio is also greatly suppressed at low temperatures. Our work demonstrates that epitaxial Cr1-delta Te films are interesting platforms for studying the physics underlying the strong PMA and large AMR. (c) 2017 Author(s).