Local control of uniaxial anisotropy in LPE bubble garnet films

Abstract

Local control of the growth‐induced anisotropy in LPE bubble garnet films can be obtained by masking part of the film with a layer of epitaxial Gd₃Ga₅O₁₂ and annealing at elevated temperatures (∼ 1200 °C) in a nitrogen atmosphere for approximately 1 h. In the regions exposed to nitrogen, the introduction of oxygen vacancies accelerates the reduction of K_u by the randomizing of the rare‐earth ion distribution.