Magnetic twisting in an artificial ferrimagnet: Anisotropic magnetoresistance on Py/Gd/Py/Gd/Py/SiNx multilayers

TL;DR

This study demonstrates that anisotropic magnetoresistance (AMR) effectively characterizes non-collinear magnetic structures in artificial ferrimagnetic multilayers, revealing two distinct twisted states through combined experimental and simulation approaches.

Contribution

It introduces a systematic method using AMR measurements and micromagnetic simulations to quantify non-collinear magnetic structures in artificial ferrimagnets.

Findings

Identification of two distinct twisted magnetic states

AMR as an effective probe for non-collinear magnetism

Quantitative characterization via simulations

Abstract

The intensive study of non-collinear magnets promotes an urgent demand for the quantitative characterization of the non-collinear magnetic structures, which host numerous exotic phenomena. Here we systematically study the non-collinear magnetic structure of an artificial ferrimagnetic multilayer. The AMR measurements reveal two distinct twisted states whose magnetic structures can be quantitatively characterized with the assistance of micromagnetic simulations. Our results manifest AMR as an ideal probe of the non-collinear magnetic structure in artificial ferrimagnets.