Microwave properties of Fe(Se,Te) thin films in a magnetic field: pinning and flux flow
Nicola Pompeo, Andrea Alimenti, Kostiantyn Torokhtii, Giulia Sylva, V. Braccini, Enrico Silva
Abstract
Abstract We present here a microwave (16 GHz) investigation of the complex surface impedance in a dc magnetic field (up to 1 T) of Fe(Se,Te) thin ( 300 nm) films. We derive the vortex parameters: the flux-flow resistivity yields information on the dynamics of the quasiparticles, the Labusch parameter yields a measure of the steepness of the pinning potential wells, and the depinning frequency assesses the frequency range where the material is suitable for high-frequency applications in a dc magnetic field. We compare the results to the data obtained in YBCO, Nb and Nb 3 Sn.
Topics & Concepts
Condensed matter physicsFlux pinningMicrowaveMagnetic fieldVortexFlux (metallurgy)Thin filmMagnetic fluxMaterials scienceElectrical resistivity and conductivityQuasiparticleFluxonSuperconductivityField (mathematics)High-temperature superconductivityPhysicsNanotechnologyMechanicsJosephson effectMetallurgyQuantum mechanicsMathematicsPure mathematicsPi Josephson junctionIron-based superconductors researchPhysics of Superconductivity and MagnetismMagnetic properties of thin films