Field modulated microwave absorption in YBa2Cu3O7/PrBa2Cu3O7 multilayers
Abstract
We describe field modulated microwave absorption measurements on YBa2Cu307 / PrBa2Cu3O7 multilayers with PrBa2Cu3O7 thickness in the range 2.5 to 10 nm and with a fixed YBa2Cu3O7 thickness of 10 nm. The Fourier spectrum of the reflected microwave power reveals one fundamental frequency which appears at Tc and even harmonics of the modulation field frequency ω at lower temperatures. The determination of the irreversibility line near Tc for different values of the PrBa2Cu3O7 thickness and inferred from the vanishing of the nonlinear response signal at 2ω in the presence of superimposed dc and modulation fields is reportedit.
- Publication:
-
Journal of Low Temperature Physics
- Pub Date:
- November 1996
- DOI:
- 10.1007/BF00768523
- Bibcode:
- 1996JLTP..105.1061D