Revealing the Altermagnetism in Hematite via XMCD Imaging and Anomalous Hall Electrical Transport.

ABSTRACT: Altermagnets are a class of magnetic materials that exhibit unconventional transport properties, such as an anomalous Hall effect (AHE), despite having compensated sublattice magnetic moments. In this study, fundamental experimental evidence of the altermagnetic nature of hematite (α-Fe₂O₃), is reported combining electrical transport with advanced X-ray photoemission electron microscopy (XPEEM) imaging with linear and circular dichroism contrast. These measurements directly visualize the Néel vector's coupling to the crystal orientation, confirming hematite's altermagnetic order and its symmetry-driven transport behavior. The transport measurements reveal an anisotropic AHE with a pronounced crystal orientation dependence, including a sign inversion for specific Néel

SUBMITTER: Galindez-Ruales E 

PROVIDER: S-EPMC12531726 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature