Vortex States near the Peak Effect Regime Detected by Voltage Noise

Abstract

We study the static and dynamic properties of vortices in the vortex solid phase of a thick amorphous MoxGe1−x film with Corbino‐disk (CD) and strip‐like contact geometries. For the strip‐like geometry the peak effect (PE) of the critical current Ic with magnetic field is clearly visible for all the temperatures studied and large voltage noise originating from current‐driven vortices appears in the field region just prior to a peak field where Ic takes a peak. For the CD geometry we observe essentially the same phenomena, indicating that the edge effects are not important for the static or dynamic properties of vortices.