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 Applied Physics
Paper
Permanent local modification of the magnetic bubble properties of epitaxial garnet films by laser annealing
Abstract
Ga-substituted magnetic garnet films are laser annealed with annealing times of several milliseconds by scanning a cw argon laser beam across the film. Locally the bubble collapse field and the saturation magnetization increase, and the domain width decreases permanently unless conventional furnace annealing is used to restore the material to its initial state. We attribute the observed effects to a crystallographic site redistribution of the Ga and the Fe atoms in annealed regions which support mobile bubbles. The site distribution is changed from a state quenched in from the growth temperature to a higher-temperature state representative of the laser-annealing treatment. The effect does not involve melting.