Phase-Sensitive Measurments of Nonlinearity in High Temperature Superconductor Thin Films at Variable Frquencies
James Booth, Kenneth Leong, Susan A. Schima, Jeffrey Jargon, Donald C. DeGroot
We present new frequency-dependent measurements of bothe the magnitude and phase of the nonlinear response in superconducting thin films at microwave frequencies. Our measurements show that the nonlinear inductance dominates the nonlinear response in thin YBCO filsm at 76K, and our analysis yields two current density scales corresponding to the real and imaginary components of the nonlinear response. The current density scale associated with the dominant inductive response likely results from intrinsic parir-breaking, while the current density scale associated with the nonlinear resistive term is smaller than the expected value due to pair-breaking, and could originate from vortex-motion or other extrinsic effects.
IEEE Transactions on Applied Superconductivity
October 3-8, 2004
Jacksonville, FL, USA
Applied Superconductivity Conference
, Leong, K.
, Schima, S.
, Jargon, J.
and DeGroot, D.
Phase-Sensitive Measurments of Nonlinearity in High Temperature Superconductor Thin Films at Variable Frquencies, IEEE Transactions on Applied Superconductivity, Jacksonville, FL, USA
(Accessed December 1, 2023)