Single crystal of garnet of calcium - gallium - germanium, as well as substrate formed by such a single crystal and provided with a layer has bubbles formed by means of a first embodiment,

摘要

P monocrystalline non-magnetic garnet, namely the garnet of gallium germanium calcium - -. Using the czochralski method, it is possible to form by the growth of the single crystals of garnet of calcium - gallium - germanium in the presence of temperatures that are much lower than in the case of use of conventional garnets, rare earth - gallium. The single crystals according to the invention are particularly well suited to form on those - latter, by epitaxy, the bubbles, in particular of the layers whose composition corresponds to the general formula lu3 fe5 o12. / p & & p & application to the recording equipment and / or reproducing. / p