Magnetooptical properties of diluted magnetic semiconductor CdMnCoTe films

The relationship between Faraday rotation /spl theta//sub F/ and magnetic field H in the visible wavelength region for films of the diluted magnetic semiconductor CdMnCoTe deposited on quartz glass substrates by molecular beam epitaxy is examined. The magnitude of /spl theta//sub F/ in the CdMnCoTe films is compared with that in CdMnTe film and ferrimagnetic garnet Bi:YIG film, and it is shown that the Faraday rotation for Cd/sub 0.51/Mn/sub 0.414/Co/sub 0.076/Te film is approximately three times that for Cd/sub 0.39/Mn/sub 0.61/Te film. The value of /spl theta//sub F/ in the Cd/sub 0.51/Mn/sub 0.414/Co/sub 0.076/Te film at an optical wavelength of 670 nm was -0.2/spl deg///spl mu/m under a magnetic field of 6.8 kOe. The relationship between the values of /spl theta//sub F/ for the diluted magnetic semiconductor films and the substrate materials is also discussed.