Abstract
We present an analysis of the magnetic anisotropy in epitaxialGa1−xMnxAs thin films through electrical transport measurements on multiterminal microdevices. Thefilm magnetization is manipulated in 3D space by a three-axis vector magnet. Anomalousswitching patterns are observed in both longitudinal and transverse resistance data. Intransverse geometry in particular we observe strong interplay between the anomalous Halleffect and the giant planar Hall effect. This allows direct electrical characterization ofmagnetic transitions in the 3D space. These transitions reflect a competition between cubicmagnetic anisotropy and an effective out-of-plane uniaxial anisotropy, with a reversalmechanism that is distinct from the in-plane magnetization. The uniaxial anisotropy field isdirectly calculated with high precision and compared with theoretical predictions.
Accepted Version (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call