| abstract |
The present invention relates to a kind of ceramic magneto-optic memory technique, it is characterized in that, it comprises the oxide ceramics taking the oxide shown in following formula (1) as principal component, and the refractive index of crystal boundary and the specific refractivity of principal phase of described oxide ceramics crystal at 25 DEG C be below 0.004, (Tb x Re 1-x ) 2 O 3 (1) (in formula, Re represents to be selected from least one element in scandium, yttrium, lanthanum, europium, gadolinium, ytterbium, holmium, lutetium, 0.4≤x≤1.0). According to the present invention, the ceramic magneto-optic memory technique of polarized light state is good and extinction ratio the is large Faraday polarization apparatus for optoisolator etc. can be reliably provided, can be provided for the miniaturization of the optoisolator of processing equipment light fibre laser. |