Median Mishaps between Chirality and Spin-Orbit Torques via Asymmetric Hysteresis

TL;DR

This paper develops a new theoretical framework for understanding spin-orbit torque by analyzing asymmetric hysteresis, focusing on individual magnetic domain behaviors to improve measurement accuracy and physical insight.

Contribution

It introduces a physically descriptive SOT model based on magnetic domain-wall chirality, integrating it with existing measurement methods to clarify SOT phenomena.

Findings

Enhanced SOT measurement accuracy

Clarified role of magnetic domain-wall chirality

Potential for advancing spintronics materials

Abstract

Averaged observations of physical phenomena have been utilized for comprehending specific occurrences in nature; however, these may overlook the crucial characteristics of individual events, thereby leading to diverse conclusions. For example, individual wave occurrences such as superposition and interference yield markedly divergent outcomes when viewed in detail. Similarly, this study enhances the comprehensive framework of spin-orbit torque (SOT) within the hysteresis loop shift measurement by employing the average of effective magnetic fields arising from two distinct magnetic reversals. This approach facilitates the presentation of a physically descriptive SOT model, previously characterized only by single chirality qualitatively. By integrating this model with established measurement methodologies and theoretical paradigms, we advance a theoretical framework based on the magnetic domain-wall chirality of individual polarizations and aim to elucidate the phenomena of SOT with clarity. The anticipated outcomes include the rectification of inaccuracies in widely employed measurement methodologies and the enhancement of our comprehension of the fundamental physics, which are expected to propel advancements in next-generation spintronics materials and devices.