Work

Impact of current-induced magnons on spin-orbit-torque analysis

Year: 2026

Type: article

Abstract: The second-harmonic Hall technique is a widely used, sensitive method for studying the spin-orbit torques generated by charge current. It exploits the dependence of the Hall resistance on the magnetization direction, although thermal phenomena also contribute. Historically, deviations from the expected magnetic field dependence have usually been ignored. On the basis of our studies on permalloy/platinum bilayers, we show that a counterpart to the magnon-related spin-flip unidirectional magnetoresistance—known to appear in the second-harmonic longitudinal resistance—appears in the Hall data, and that describing the results in a wide field range with these contributions is essential to accurately estimate the torques.

Source: Physical Review Applied

DOI: 10.1103/x78x-qt5z

Authors: Tamás Prok, Jan Hidding, Szabolcs Csonka, Péter Makk, Marcos H.D. Guimarães, Endre Tóvári

Institutions: University of Groningen, Budapest University of Technology and Economics, HUN-REN Centre for Energy Research

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid