New Galvanomagnetic Effects of Polycrystalline Magnetic Films

TL;DR

This paper predicts three novel galvanomagnetic effects in polycrystalline magnetic films arising from their two-dimensional structure, expanding understanding beyond traditional Hall and magnetoresistance phenomena.

Contribution

It introduces a general analysis predicting three new galvanomagnetic effects specific to polycrystalline magnetic films, based on their two-dimensional nature.

Findings

Longitudinal resistivity depends linearly on perpendicular magnetization component.

Current parallel to magnetization can generate vertical electric fields.

Perpendicular current can induce electric fields along magnetization.

Abstract

Within the linear response of polycrystalline magnetic films to electric currents, a general analysis predicts three new galvanomagnetic effects originated from the two-dimensional nature of the films. These new galvanomagnetic effects, which differ from the conventional extraordinary Hall effect and anisotropic magnetoresistance, are follows. 1) The longitudinal resistivity depends linearly on the magnetization component perpendicular to a film. 2) A current parallel to the magnetization can generate an electric field in the vertical direction of a film. 3) A current perpendicular to a film can generate an electric field along the magnetization direction.