Symmetry and polarity of the voltage-controlled magnetic anisotropy studied by the Anomalous Hall effect

TL;DR

This paper investigates the symmetry and polarity of voltage-controlled magnetic anisotropy (VCMA) in FeB and FeB/W films using multiple measurement techniques, revealing linear dependencies on gate voltage.

Contribution

It provides a comprehensive experimental analysis of VCMA effects, demonstrating consistent linear relationships across various magnetic properties.

Findings

Coercive field decreases with positive gate voltage

Hall angle and anisotropy field decrease with increasing gate voltage

Magnetization switching and retention times are linearly affected by gate voltage

Abstract

The voltage-controlled magnetic anisotropy (VCMA) effect in FeB and FeB/W films was measured by four independent methods. All measurements are consistent and show the same tendency. The coercive field, Hall angle, anisotropy field, the magnetization switching time and retention time linearly decrease when the gate voltage increases and they linearly increase when the gate voltage decreases.