High dielectric constant material Ba0.6Sr0.4TiO3 (BST) was heteroepitaxially grown over YBa2Cu307-x(YBCO)on Lanthanum aluminate (LaAlO3) substrates. The electrical characteristics of the BST film was studied by depositing electron beam evaporated platinum(Pt). The capacitance-voltage (C-V) measurements at various temperatures up to 100°C show negative temperature coefficient for capacitance, confirming the paraelectric phase. The capacitance vs voltage and current vs voltage characteristics show asymmetry with the polarity of the applied voltage. The asymmetry in the capacitance and current-voltage characteristics can be explained by defect chemistry model of electrode/oxide interface.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Control and Systems Engineering
- Ceramics and Composites
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry