  The response of an electron system to a DC measurement electric field has
been investigated in the case when the system is driven out of the equilibrium
by the magnetic ultra-high frequency field that leads to combined transitions.
The discussed model includes contributions from Landau quantization and from
microwave irradiation. Impurity centers are considered as sources of
scattering. It has been shown that the perturbation of the electron system by
the ultra-high frequency magnetic field leads to oscillations of the diagonal
components of the conductivity tensor.
