Garnet compositions for bubble domain systems utilizing stress-induced uniaxial anisotropy

Garnet compositions have been developed which utilize stress-induced uniaxial anisotropy to attain stable magnetic bubble domains. The compositions were designed to be useful as epitaxial films on single crystal Gd3Ga5O12 or Sm3Ga5O12 substrates and were tested as annealed (> 1200°C) bulk crystal platelets which were mechanically stressed by being bonded to glass substrates with thermal setting epoxy resins at ∼ 200°C. These annealed platelets exhibited cubic domains prior to mechanical stressing and were free of any growth anisotropy. Properties of (Sm,Dy,Y)3(Fe,Ga)5O12 and (Gd,Y,Yb)3(Fe,Ga)5O12 garnets relevant to bubble domains are discussed. © 1971.