Effect of in-plane magnetic field on bubble collapse field in ion-implanted garnet films

Abstract

Bubble collapse fields in several kinds of garnet films ion implanted for hard‐bubble suppression were measured in the presence of an in‐plane magnetic field and were found to vary according to the direction of the in‐plane field. That is, bubble collapse fields exhibit a threefold symmetry in response to the threefold symmetry of crystallographic axes. The appearance of this threefold symmetry was explained by the response of closure domains associated with bubbles to in‐plane fields. This phenomenon is shown to be dependent on the properties of garnet films and implantation conditions, i.e., dose, energy, and ion species used: H, Ne, and Ar.