Title :
Nonlinear surface impedance of Y-Ba-Cu-O films in a DC magnetic field
Author :
Tsindlekht, M. ; Golosovsky, M. ; Davidov, D. ; Jacob, A.F.
Author_Institution :
Racah Inst. of Phys., Hebrew Univ., Jerusalem, Israel
fDate :
6/1/1997 12:00:00 AM
Abstract :
We study the microwave power dependence of the surface impedance of YBCO epitaxial films in a DC magnetic field up to 0.7 T. We demonstrate that the surface impedance of our films in the linear regime is dominated by weak links at low DC field and by vortices at high DC field. However, the microwave power dependence of the surface impedance arises mostly from the hysteretic RF vortex penetration.
Keywords :
barium compounds; electric impedance; flux-line lattice; high-temperature superconductors; penetration depth (superconductivity); superconducting epitaxial layers; superconducting thin films; surface conductivity; yttrium compounds; 0 to 0.7 T; DC magnetic field; Y-Ba-Cu-O films; YBaCuO; epitaxial films; hysteretic RF vortex penetration; microwave power dependence; surface impedance; weak links; Electrical resistance measurement; Inductance; Magnetic fields; Magnetic films; Resonance; Superconducting films; Surface fitting; Surface impedance; Surface resistance; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
