  We confirm the existance of magneto-resistance oscillations in a
microwave-irradiated two-dimensional electron gas, first reported in a series
of papers by Zhudov et al. and Mani et al. In our experiments, on a sample with
a more moderate mobility, the microwave induced oscillations are observed not
only in the longitudinal - but also in the transverse-resistance (Hall
resistance). The phase of the oscillations is such that the decrease (increase)
in the longitudinal resistance is accompanied by an increase (decrease) in the
absolute value of the Hall resistance. We believe that these new results
provide valuable new information to better understand the origin of this
interesting phenomenon.
