| abstract |
The present invention provides transparent magneto-optic memory technique, it includes contain the composite oxides indicated by following formula (1) as the crystalline ceramics of principal component or the monocrystalline of the composite oxides indicated by following formula (1), Verdet constant under wavelength 1064nm is 0.14 minute/(Oecm) more than, optical-fiber laser that will not be 0.9~1.1 μm of absorption bands, the generation of thermal lens is not caused yet, Verdet constant ratio TGG crystallization is big, is suitble to constitute the magneto-optic device of optoisolator etc..Tb 2 R 2 O 7 (1) (in formula, R is at least one kind of element (not including for the individual situation of the element but, for silicon, germanium and tantalum) in silicon, germanium, titanium, tantalum, tin, hafnium, zirconium.). |