• Accepted Paper

Probing spin configurations in exchange-coupled magnetic bilayers with orthogonal anisotropies via anomalous Hall and Nernst effects

Sebin Jung, Hiroki Koizumi, Hiroaki Sukegawa, and Hideto Yanagihara

Phys. Rev. B - Accepted 14 September, 2026

DOI: https://doi.org/10.1103/rm4y-wdyv

Abstract

When two ferromagnetic thin films with different magnetic easy axes are coupled via the exchange interaction, the magnetization process becomes nontrivial. In this paper, we demonstrate that three-dimensional magnetization information in such a bilayer system can be accessed electrically by combining measurements of the anomalous Hall effect (AHE) and anomalous Nernst effect (ANE). Specifically, we investigate a CoFe2O4(001)/Fe bilayer, where the insulating nature of CoFe2O4 ensures that these transport measurements selectively probe only the conductive Fe layer. By combining the AHE and ANE results and comparing them with a simple micromagnetic simulation, we probe the magnetic configuration of antiferromagnetically coupled Fe layer and suggest the emergence of a twisted magnetic structure near the interface.

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