Poster: Synthesis of the high magnetic anisotropy iron garnets thin films for spintronic applications

Magnetic anisotropies play an essential role in stabilizing spin textures in magnonic materials. Among different types of magnonics materials, Yttrium iron garnet (YIG) has attracted enormous attention because of its significant magnon decay length. The spintronic application of YIG is hindered due to its weak magnetic anisotropy when YIG thin films grow on the gadolinium gallium garnet (GGG) substrate. This challenge can be overcome by substituting yttrium with rare-earth metals and inducing the strain by the lattice mismatch. In this work, we used the sol-gel-based spin coating with high-temperature annealing followed by quenching to enhance the magnetic anisotropy of the YIG and thulium iron garnet (TmIG) samples. We found that the quenching generates high strain in the thin films, ultimately increasing the magnetic anisotropy. Furthermore, our grazing incident XRD and ferromagnetic magnetic resonance experiments confirmed that stress-induced anisotropy is the major contributor to magnetic anisotropy.¹ Our experimental techniques demonstrated how to grow magnetic materials with high magnetic anisotropy, which can host the spin textures at room temperature.