A YIG film on a diamagnetic YSGAG substrate holds an FMR linewidth near 0.1-0.2 mT from 300 K to 30 mK, avoiding the low-temperature damping rise of YIG on GGG.
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YSGAG: The Ideal Substrate for YIG in Quantum Magnonics
A YIG film on a diamagnetic YSGAG substrate holds an FMR linewidth near 0.1-0.2 mT from 300 K to 30 mK, avoiding the low-temperature damping rise of YIG on GGG.