Study of vortex dynamics in an a-MoGe thin film using low-frequency two-coil mutual inductance measurements

Abstract

We extract the vortex lattice parameters using low-frequency two-coil mutual inductance measurements in a 20-nm-thick superconducting 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 vortex lattice parameters such as pinning constant, vortex lattice drag coefficient, and pinning potential barrier. We show that the extracted parameters follow the magnetic field variation expected for a weakly pinned 2-dimensional vortex lattice.

21 pages, 6 figures

References in corpus (4)

• Reliable determination of vortex parameters from measurements of the microwave complex resistivity
• Extreme sensitivity of the vortex state in a-MoGe films to radio-frequency electromagnetic perturbation
• Enhancing the effective critical current density in a Nb superconducting thin film by cooling in an inhomogeneous magnetic field
• Phase fluctuations in a conventional s-wave superconductor: Role of dimensionality and disorder