Dissipation in the superconducting mixed state in the presence of a small oscillatory magnetic-field component

We have studied the electric resistivity in superconducting amorphous Mo₃Si films in a perpendicular magnetic field B₀+B₁ sin {ω}t with B₁{}B₀. For B₁=0 a resistive voltage only appeared due to flux creep above the critical current Ic. For B₁>0 we observed perfectly Ohmic behavior at currents I{}Icn(B₁=0), with the resistivity increasing proportional to {ω} and B₁. We present a simplified model discussion explaining our results in terms of the magnetic flux transferred across the sample during each cycle of the oscillatory magnetic field because of the electric transport current.