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Transport, magnetic, magneto-optical (Kerr effect) and optical (lightabsorption) properties have been studied in an oriented polycrystallineLa_{0.67}Ca_{0.33}MnO_{3} film which shows colossal magneto-resistance. Thecorrelations between these properties are presented. A giant change in IR lighttransmission (more than a 1000-fold decrease) is observed on crossing the Curietemperature (about 270 K) from high to low temperature. Large changes intransmittance in a magnetic field were observed as well. The giant changes intransmittance and the large magneto-transmittance can be used for developmentof IR optoelectronic devices controlled by thermal and magnetic fields.Required material characteristics of doped manganites for these devices arediscussed.Comment: 7 pages, 7 figures, submitted to J. Appl. Phy

Giant change in infrared light transmission in La0.67Ca0.33MnO3 film near the Curie temperature