About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Journal of Physics D: Applied Physics
Paper
High-speed photography of topological switching and anisotropic saturation velocities in a misoriented garnet film
Abstract
The topological switching of a bubble array into one of the opposite polarity by a bias field pulse is studied in a garnet film by high-speed photography. The key requirement for regular switching is found to be an anisotropic wall velocity which causes the expanding bubbles to make contact with only four out of six of the nearest neighbours. The same anisotropy of almost 2:1 in the saturation velocity is also observed in isolated bubbles pulsed to expand. The velocity anisotropy and the static bubble ellipticity are related to a 2.2 degrees misorientation of the film's (111)-axis from the surface normal, which gives rise to an in-plane magnetic anisotropy.