Publication
IEEE Transactions on Magnetics
Paper

Magnetic properties of laser annealed garnet films as determined by FMR and bubbles statics

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Abstract

The effects of high power laser irradiation upon the magnetic properties of Ga-substituted garnet films were studied by ferromagnetic resonance (FMR) and bubble statics. FMR measurements showed that for a certain range of laser power, annealing changes the magnetic properties in a layer located at the free surface, the thickness of which increases with increasing laser power P. For a sufficiently high P the whole film is transformed, and for even higher P the film is melted in a thin surface layer. The change of collapse field and stripe width as a function of P is fairly well explained by this model. The modification of the magnetic properties can be well explained by a migration of about 3% of Ga<sup>3+</sup> from the tetra-to the octahedrical site, but surprisingly the amount of Ga migration is independent of the laser power. © 1980 IEEE

Date

01 Jan 1980

Publication

IEEE Transactions on Magnetics

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