Spin Hall magnetoresistance at the altermagnetic insulator/Pt interface
Phys. Rev. Materials 9, 084403 – Published 7 August, 2025
DOI: https://doi.org/10.1103/hksk-qxl5
Abstract
The resistance of a heavy metal can be modulated by an adjacent magnetic material through the combined effects of the spin Hall effect, inverse spin Hall effect, and dissipation of the spin accumulation at the interface. This phenomenon is known as the spin Hall magnetoresistance. The dissipation of the spin accumulation can occur via various mechanisms, with spin-transfer torque being the most extensively studied. In this work, we report the observation of spin Hall magnetoresistance at the interface between platinum and an insulating altermagnetic candidate, . Our findings reveal that this heterostructure exhibits a relatively large spin Hall magnetoresistance signal, which is anisotropic with respect to the crystal orientation of the current channel. We explore and rule out several potential explanations for this anisotropy and propose that our results may be understood in the context of the anisotropies of the spin current channels across the Pt/altermagnetic interface.
Physics Subject Headings (PhySH)
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Magnetic Phenomena at Oxide Interfaces: Fundamentals to Devices
The Editors of Physical Review Materials are pleased to present the Collection on Magnetic Phenomena at Oxide Interfaces, highlighting cutting-edge advances in oxide interface magnetism and its applications. The Collection is being guest-edited by Lucas Caretta from Brown University (USA) and Jacobo Santamaria from Universidad Complutense de Madrid (Spain). Every article published in this collection underwent a rigorous peer review process, adhering to the same high standards applied to all papers. The Physical Review Materials editorial team managed the peer review and made all editorial decisions.
