Electrochemical techniques are exploited to fabricate conductive polymer/high-Tc superconductor bilayer structures. Scanning electron microscopy, atomic force microscopy, and electrochemical techniques are utilized to characterize the electrodeposition of polypyrrole layers grown onto YBa2Cu3O7-δ films. In such hybrid polymer/ superconductor systems, it is found that, when the polymer is oxidized to its conductive state, the transition temperature (Tc) and critical currents (Jc) of the underlying superconductor film are suppressed. Reversible modulations of the transition temperatures of up to 50 K are noted for these structures. Upon reduction of the conductive polymer layer back to its nonconductive form, both Tc and Jc are found to return to values close to those acquired for the underivatized YBa2Cu3O7-δ film.
ASJC Scopus subject areas
- Colloid and Surface Chemistry