Patent ID: 7133189
Filing Date: 2006-11-07
Classification: C30B,G02F,H01F

Abstract:
1. A Faraday rotator comprising: a bismuth-substituted rare earth-iron-garnet single-crystal film; and two surfaces formed on the single-crystal film for light transmission through them; wherein the single-crystal film is represented by a chemical formula: wherein R is at least one element selected from a group consisting of rare earth elements and Y; A is at least one element selected from Pb, Ca and Cd; x and y satisfy 1.5<x +y<2.5 and y>0; M is at least one element selected from Ga, Al, Sc and In; B is at least one element selected from Si, Ti, Ge, and Mg; and z and w satisfy 0≦z+w<1.5, and, when y in one of the two surfaces is represented by y