An experimental study has been made of the electric field effect in an electrode/insulator/superconductor system on the critical current (Ic) and the current/voltage characteristics at 77 K of highly textured Bi2Sr2CaCu2Oy (2212) superconductors. Large polycrystalline 2212 bars were prepared by directional isothermal growth from a melt. It was established that in strong electric fields (to 120 MV/m) Ic in the bars increases as much as 20% and resistance decreases for current I > Ic. The field effect is reversible and is observed in various field orientations with respect to the growth direction of the bars. Peculiarities of the field effect are observed in the presence of hysteresis of the current/voltage characteristics.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering