It has been found that YBaCuO thin films exhibit hysteretic I- V characteristics in the case of high critical current densities of yc(4.2 K)> 106 A/cm2. By using the hysteretic I-V characteristics, relaxation oscillators can be constructed, where YBaCuO thin films are shunted by an external inductance and a resistance. The properties of the relaxation oscillator agree well with those of an equivalent circuit model. A preliminary experiment is also made on the optical response of the oscillation frequency in order to study the possibility of the relaxation oscillator as an optical sensor.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)