We report measurements of magneto-rotational effects in the coherent forwar
d scattering of light on an ensemble of cold Li-7 atoms. The effect of the
cold atomic cloud on the polarization state of a probe beam is studied for
magnetic fields in the Faraday and Voigt configurations. Magneto-optical ef
fects with cold atoms have the potential to be highly sensitive tools for t
he spatially and temporally resolved detection of either small atomic ensem
bles or small magnetic fields.