Interfacial origin of magnetic compensation and topological-like Hall effect in crystalline lutetium iron garnet thin films.

Satakshi Pandey; Anne Forget; Sarah Clement; Christophe Gatel; B{é}n{é}dicte Warot- Fonrose; Gr{é}goire de Loubens; Jean-Baptiste Moussy

arXiv · 2610.25965

Interfacial origin of magnetic compensation and topological-like Hall effect in crystalline lutetium iron garnet thin films.

Satakshi Pandey·Anne Forget·Sarah Clement·Christophe Gatel·B{é}n{é}dicte Warot- Fonrose·Gr{é}goire de Loubens·Jean-Baptiste Moussy

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Abstract

Ferrimagnetic oxides such as rare-earth iron garnets (REIG) have emerged as essential components of spin-based devices owing to their high Curie temperatures, low Gilbert damping, and excellent insulating properties. Recently, REIGs have attracted immense interest for hosting robust chiral spin textures that can be potential information carriers in next-generation spintronic devices. Here we investigate the structural, chemical, and magnetic behaviour of single-crystal Lu3Fe5O12 (LuIG) thin films for different film thicknesses on a Gd3(Mg,Zr)Ga5O12(111) or SGGG(111) substrate. Our results demonstrate the presence of a 3 nm-thick Gd-rich LuIG layer at the LuIG/SGGG interface, which gives rise to a magnetic compensation temperature around 50 K. We further probe the anomalous Hall effect (AHE) in LuIG layers with an adjacent platinum ultrathin film. In addition to the magnetic compensation point, the AHE loops show pronounced nonmonotonic features, often attributed to the spin Hall topological-like Hall effect (SH-THE) and non-collinear spin textures arising from the Dzyaloshinskii-Moriya interaction (DMI). LuIG thickness-dependent AHE measurements reveal that the composition variation due to Gd diffusion breaks the inversion symmetry and could contribute to DMI. These findings shed light on fundamental understanding and engineering of the different interfaces of magnetic garnets for advanced spintronic device applications.

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Satakshi Pandey, Anne Forget, Sarah Clement, Christophe Gatel, B{é}n{é}dicte Warot- Fonrose, Gr{é}goire de Loubens, Jean-Baptiste Moussy. 2026-10-19. Interfacial origin of magnetic compensation and topological-like Hall effect in crystalline lutetium iron garnet thin films.. https://arxiv.org/abs/2610.25965

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