Abstract
We extract the vortex lattice (VL) parameters using low-frequency two-coil mutual inductance measurements in a 20-nm-thick superconducting amorphous Molybdenum-Germanium (a-MoGe) thin film. We fit the temperature dependence of ac penetration depth in the mixed state using a model developed by Coffey and Clem and demonstrate a procedure for extracting VL parameters such as the restoring pinning force constant (Labusch parameter) VL drag coefficient, and pinning potential barrier. We show that the extracted parameters follow the magnetic field variation expected for a weakly pinned two-dimensional vortex lattice.
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