Abstract
Ferrimagnetic garnet films, mainly gadolinium iron garnet, were deposited on fused-quartz substrates and subsequently heat-treated. They were studied by optical microscopy, X-ray analysis, and electron microscopy. Magnetic properties were measured and domains observed by employing the Faraday magneto-optic effect. Structure and properties were found to depend on growth parameters established in the heat-treatment step. The role of chemical factors in promoting the observed anomalies in structure (such as precipitation of Gd2O3 particles) and in properties (like the unusually high compensation temperature of the thinner films) is emphasised in the discussion of results.
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