| 摘要 |
PURPOSE:To obtain the titled material which can be produced at a comparatively low cost and is capable of obtaining the desired Faraday effect even when the thin material is used by forming a single crystal film of specified composition on a gadolinium-gallium-garnet single crystal substrate. CONSTITUTION:A magnetic single crystal film having a composition expressed by the formula (R is Lu, Yb, Tm, Er, Ho, and Y, M is Al and Ga, 0<x<1.5, and 0<=y<0.5) is epitaxially grown on the gadolinium-gallium-garnet single crystal substrate to obtain the desired magnetic garnet material for a magneto- optical element. Consequently, the substrate need not be shaved off after the magnetic garnet single crystal is grown unlike the case where a neodynium- gallium-garnet substrate is used, and the material can be produced at a comparatively low cost. Moreover, since the conformity in the lattice constant between the magnetic garnet single crystal film and the substrate is excellent, the yield of products is high.
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