Abstract
A new hydrothermal technique is described in which the garnet synthesis is performed directly in the autoclave in low concentration basic solutions (NaOH or KOH). This method avoids a strong attack of the substrate and leads to uniform thickness and composition films. The best experimental conditions are given for the growth of Ga:YIG, Gd:Ga:YIG, Eu:Ga:YIG, Eu:Ga:ErIG and Gd:Ga:ErIG films on GdGaG substrates. Magnetic characterizations are presented and the properties of hydrothermal garnet films are discussed and compared with those of L.P.E. and C.V.D. garnet films.
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