Abstract
We have measured the magnitude and phase of the microwave transmission through thin films of Y-Ba-Cu-O on MgO substrate in the presence of a dc magnetic field H0 and an oscillating magnetic field. The oscillating field modulates the microwave transmission in the superconducting state with the generation of many high-order even harmonics for H0=0. For H0 0 there is a symmetry-breaking and additional odd-harmonic generation. This strong nonlinear behavior may be explained by a model which assumes an array of Josephson junctions and vortex motion in the presence of a magnetic field. An estimate of the Josephson-junction area is obtained from the field dependence of the amplitude of the second harmonic.
Original language | English |
---|---|
Pages (from-to) | 9299-9302 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 40 |
Issue number | 13 |
DOIs | |
State | Published - 1989 |