Abstract
We report on the dynamic response of the (weakly disordered) vortex lattice to an applied radial current I in the Corbino disk (CD) of amorphous Mo x Ge 1− x films with different diameters ( d = 4.6 and 1.6 mm). In CD, the vortices circulate around the center of the sample by feeling a nonuniform Lorentz force inversely proportional to the radius of rotation. We find irrespective of d that, with increasing I in the solid phase, the vortices near the center are first depinned, indicative of the plastic flow-like rotation instead of the elastic rotation. We also find that, with further increasing I, the plastic flow gives way to the liquid-like rotation. In the length range studied the sample size ( d) does not affect the dynamic response of vortices.
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