Rectification effect of the harmonical signal by high temperaturesuperconductive thin film in the mixed state

Abstract

The films of Y Ba Cu 0 (YBCO) have been grown by pulse laser deposition on Mg0 substrates. X-ray diffraction shows that YBCO grow on (001) MgO with c axis is oriented normal to the substrate. A 100 nm × 0.09 mm × 0.5 mm YBCO films on MgO shows there is critical current density of about (3.5–5.0)x10 6 A/cm 2 at 77 K. Films have a superconductive transition temperature of 90.0 K. I–V curves of the HTSC microbridges have been investigated at passing through their direct current and resistive heating. Besides,if the microbridge had been applied on harmonical signal, nonlinearity of I–V curves of HTSC in the mixed state was inducing by the harmonical signal, is leading to the rectification of this signal.