Yttrium iron garnet
Yttrium iron garnet (YIG) is a kind of synthetic garnet, with chemical composition Y3Fe2(FeO4)3, or Y3Fe5O12. It is a ferrimagnetic material with a Curie temperature of 560 K. YIG may also be known as Yttrium ferrite garnet, or as Iron yttrium oxide or Yttrium iron oxide, the latter two names usually associated with powdered forms.