Title :
Nonlinear response of suspended high temperature superconducting thin film microwave resonators
Author :
Willemsen, B.A. ; Derov, John S. ; Silva, J.H. ; Sridhar, S.
Author_Institution :
Dept. of Phys., Northeastern Univ., Boston, MA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
The nonlinear microwave surface impedance, Z/sub s/(H/sub rf/) of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/(-/spl delta/) thin films is measured using suspended patterned resonators. We find that the nonlinear response is well described in terms of a single mechanism, namely the hysteretic ac response of the current-induced critical state.<>
Keywords :
barium compounds; flux flow; high-temperature superconductors; superconducting epitaxial layers; superconducting microwave devices; superconducting resonators; surface conductivity; yttrium compounds; 3.73 GHz; 70 to 83 K; Bean critical state; LaAlO/sub 3/; Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin films; Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/; current-induced critical state; epitaxial films; flux penetration; hysteretic AC response; nonlinear microwave surface impedance; nonlinear response; suspended HTSC thin film microwave resonators; suspended patterned resonators; vortex dynamics; Couplings; High temperature superconductors; Hysteresis; Impedance measurement; Laboratories; Magnetic field measurement; Resonance; Resonant frequency; Superconducting thin films; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
