Open AccessMicrowave properties of Fe(Se,Te) thin films in a magnetic field: pinning and flux flow
Author(s) -
Nicola Pompeo,
Andrea Alimenti,
Kostiantyn Torokhtii,
Giulia Sylva,
V. Braccini,
Enrico Silva
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1559/1/012055
Subject(s) - condensed matter physics , flux pinning , microwave , magnetic field , vortex , flux (metallurgy) , thin film , magnetic flux , materials science , electrical resistivity and conductivity , quasiparticle , fluxon , superconductivity , field (mathematics) , high temperature superconductivity , physics , nanotechnology , mechanics , josephson effect , metallurgy , pi josephson junction , mathematics , quantum mechanics , pure mathematics
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.