Giant change in IR light transmission in La_{0.67}Ca_{0.33}MnO_{3} film   near the Curie temperature: promising application in optical devices
  Transport, magnetic, magneto-optical (Kerr effect) and optical (light absorption) properties have been studied in an oriented polycrystalline La_{0.67}Ca_{0.33}MnO_{3} film which shows colossal magneto-resistance. The correlations between these properties are presented. A giant change in IR light transmission (more than a 1000-fold decrease) is observed on crossing the Curie temperature (about 270 K) from high to low temperature. Large changes in transmittance in a magnetic field were observed as well. The giant changes in transmittance and the large magneto-transmittance can be used for development of IR optoelectronic devices controlled by thermal and magnetic fields. Required material characteristics of doped manganites for these devices are discussed. 
Yu. P. Sukhorukov, E. A. Gan'shina, B. I. Belevtsev, N. N. Loshkareva,   A. N. Vinogradov, K. D. D. Rathnayaka, A. Parasiris...