Abstract
We report on measurements of the mode-locking (ML) resonance for the thick and thin films of amorphous MoxGe1−x with weak pinning. The clear ML resonance indicative of driven vortex lattices is observed for the thick film, while it is not visible for the thin film. The results suggest that for the thin film the elasticity of driven lattices may be significantly reduced and the lattices may be unstable against small pinning.
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