BISMUTH-SUBSTITUTED TYPE RARE EARTH IRON GARNET CRYSTAL FILM, PRODUCTION METHOD THEREOF, AND OPTIC

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PROBLEM TO BE SOLVED : To provide a bismuth-substituted type rare earth iron garnet crystal film having industrially high yield, and having a loss reduced to 0.35 dB, while reducing a light absorption amount in 1 μm band. SOLUTION : There is provided a bismuth-substituted type rare earth iron garnet crystal film expressed by following chemical formula (1) : Nd3-x1-y1Gdx1Biy1Fe5O12...(1) (in the chemical formula (1). x1 satisfied 0.65≤x1≤0.84, and y1 satisfies 1.00≤y1≤1.15). SELECTED DRAWING : Figure 7 COPYRIGHT : (C)2018, JPO&INPIT