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MA: Fachverband Magnetismus

MA 52: Poster Magnetism III

MA 52.10: Poster

Donnerstag, 12. März 2026, 15:00–17:00, P4

Low-temperature-compatible iron garnet films grown by liquid phase epitaxy — Jamal Ben Youssef¹, Nathan Beaulieu¹, Richard Schlitz², Davit Petrosyan³, •Michaela Lammel², and William Legrand⁴ — ¹LabSTICC-CNRS, Université Bretagne Occidentale, Brest — ²Department of Physics, University of Konstanz, Konstanz — ³Department of Materials, ETH Zurich, Zurich — ⁴CNRS, Institute Néel, Université Grenoble Alps, Grenoble

Integrating thin epitaxial yttrium iron garnet (YIG) - one of the prototypical material systems in the field of magnonics, owing to its record-low damping of the magnetization dynamics - into hybrid (quantum) systems promises a platform to study the interaction of magnons with other (quasi)particles. However, up to now the usability of YIG in such devices is limited due to the losses occurring at low temperatures due to the paramagnetic gadolinium gallium garnet (GGG) substrate, and eventually Gd intermixing in the first layers. To circumvent this problem, we use liquid phase epitaxy (LPE) to grow ultrathin films of strained YIG on a commercial diamagnetic substrate, yttrium scandium gallium garnet (YSGG) [arXiv:2509.06242]. We investigate their magnetization dynamics between 3 K and 300 K, and compare them to films grown on paramagnetic GGG. We demonstrate that our LPE YIG on YSGG substrates features a ferromagnetic resonance linewidth below 1 mT at 3 K, together with a very weak temperature and frequency dependence of the losses. Therewith, the growth of YIG/YSGG by LPE provides a straightforward approach for the fabrication of YIG thin films for low-temperature investigations.

Keywords: LPE; YIG; magnetization dynamics; YSGG