Evolution of anomalous Hall behavior in thin Pt/Co/Pt trilayers

Abstract

In this work, through controlling spin scattering mechanisms, anomalous Hall behaviors exhibit a series of evolutions in thin Pt/Co/Pt trilayers. The shape of Hall resistivity over longitudinal resistivity (ρ AH /ρ xx versus ρ xx) curve turns from bending to linear and then bending again in most trilayers. This kind of evolution cannot be explained by the conventional linear scaling of anomalous Hall effect. It should be ascribed to the contribution of spin-phonon skew scattering. Our research may help to understand spin scattering behavior in low-dimensional systems more deeply and build a proper synergy between theory and experiment on the research of anomalous Hall effect.

Perpendicular magnetic anisotropy in Mn2CoAl thin film

“…1(i), a slightly bending Hall curve (ρ AH /ρ x x vs ρ x x ) can be fitted well by the expanded scaling 24 written by ρ AH = a ′ ρ x x0 + a ′′ ρ x xT + bρ ) is comparative to the intrinsic contribution (bρ x x0 ), the contribution of spin-phonon skew scattering is non-negligible, resulting in a nonlinear relationship between ρ AH /ρ x x and ρ x x . 25 Anomalous Hall behavior observed in the Mn 2 CoAl thin film supports the expanded scaling. with increasing annealing temperature and PMA is realized near 300…”