Anomalous Hall Effect in perpendicularly magnetized Mn(_{3-x})Ga thin films

TL;DR

This study investigates the anomalous Hall effect in Mn$_{3-x}$Ga thin films with perpendicular magnetic anisotropy, analyzing how composition and substrate influence the Hall resistivity and scattering mechanisms.

Contribution

It provides new insights into the anomalous Hall effect in Mn$_{3-x}$Ga thin films with different compositions and substrates, highlighting the role of crystallographic phase and magnetic anisotropy.

Findings

Anomalous Hall effect observed in tetragonal D0$_{22}$ phase.

Hall resistivity varies with temperature and composition.

Skew scattering and side jump coefficients depend on film properties.

Abstract

Mn$_{3-x}$Ga (x = 0.1, 0.4, 0.7) thin films on MgO and SrTiO$_3$ substrates were investigated with magnetic anisotropy perpendicular to the film plane. An anomalous Hall-effect was observed for the tetragonal distorted lattice in the crystallographic D0$_{22}$ phase. The Hall resistivity $\varrho_{xy}$ was measured in a temperature range from 20 to 330 K. The determined skew scattering and side jump coefficients are discussed with regard to the film composition and used substrate and compared to the crystallographic and magnetic properties.