Interfacial polarization and High Frequency ($>$100 MHz) Stable Capacitor Functions of Nanodielectric BaTiO3 Composites

We report fabrication of nanodielectric composites of barium titanate (BTO) in LiF and PMMA dielectric materials by electron-beam-assisted vapor-phase codeposition at temperature ($\sim$35 $^{\circ}$C). The fabricated nanodielectric composites showed unique nanometric interfacial polarization properties that resulted in very promising high-frequency ($>$ 100 MHz) capacitor functions. The best capacitor performance was achieved from as-deposited BTO-LiF nanodielectric systems that exhibited a flat capacitance density of about 10 nF/cm$^2$ with the self resonance frequency occurring at around 150 MHz along with a low loss tangent of about 0.1 at 100 MHz, thus verifying the high-quality of the device structures.