We investigated dielectric properties of La1-xEu xNb2O7 perovskite nanosheets in order to study the effect of A-site modification on dielectric properties. Langmuir-Blodgett deposition was employed to fabricate multilayer nanofilms of perovskite nanosheets. In these nanosheets, A-site modification with Eu3+ ions improves the leakage current characteristics and, at the same time, reduces permittivity. The slight modification with Eu3+ ions in La0.95Nb 2O7 nanosheets causes a 50% reduction in εr value. We also discuss the high-κ properties of La 0.95Nb2O7 nanosheets by performing detailed investigations based on first-principles calculations and interfacial structures.
ASJC Scopus subject areas