INDUCED VOLTAGE IN A 2DEG CAUSED BY A MOVING INHOMOGENEOUS MAGNETIC-FIELD

We study theoretically the magnetic coupling between a superconducting film and a 2DEG by generalizing the theory of Meincke and that of Ram mer and Shelankov, correctly taking into account the Hall effect in th e 2DEG. The induced voltages are discussed in the magnetic-field regim e in which the magnetoresistance is dominated by the SdH oscillations. The results obtained are found to be in good agreement with the exper iment of Kruithof et al. We find the modulation of the magnetic field in the 2DEG is larger than previously expected.