Magneto-optical bistability in diluted magnetic semiconductor Cd1-xMnx
Te is realized. The bistability is created by the giant Faraday effect
in Cd1-xMnxTe and the saturation characteristic of the magneto-optica
l feedback system. The bistability characteristic depends on the orien
tation angle alpha of the polarizers of the Faraday modulator and on t
he temperature of the sample.