“…Yttrium iron garnet (Y 3 Fe 5 O 12 , YIG) has the lowest known Gilbert damping, as low as 10 –5 in bulk. ,, However, the growth of high-quality YIG films with PMA has been challenging, despite several demonstrations of epitaxial − and polycrystalline PMA YIG films. Instead, epitaxial BiYIG can be grown with PMA on garnet substrates with higher lattice parameters than GGG by exploiting a combination of magnetoelastic and growth-induced anisotropies. , The Gilbert damping of BiYIG films is 1.3 × 10 –4 –5.6 × 10 –4 , an order of magnitude higher than that of YIG but much lower than that of REIGs with strong spin–orbit coupling. − ,, For example, the damping of TmIG films is around 0.02. ,, While the low damping of BiYIG films enables fast domain wall dynamics, BiYIG films exhibit no DMI and SOT-driven domain wall motion can be achieved only in the presence of an in-plane magnetic field. , …”