Magnetic and dielectric property control in the multivalent nanoscale perovskite Eu_0.5Ba_0.5TiO₃

Abstract

We report nanoscale Eu0.5Ba0.5TiO3, a multiferroic in the bulk and candidate in the search to quantify the electric dipole moment of the electron. Eu0.5Ba0.5TiO3, in the form of nanoparticles and...

Nanocomposite Dielectric Films with Interphasic Response from Olefin Metathesis of Functionalized HfO2 Nanocrystals

“…However, conventional organic field-effect transistors are plagued by the need for high operating voltages as a result of the low dielectric constants of most polymers, which thereby necessitate large gate voltages to modulate carrier concentrations in semiconductor channels. − In addition to their low dielectric constants, polymer dielectrics often suffer from substantial polarization disorder, low breakdown voltages, ill-defined interfaces, and a propensity for charge trapping. , As such, the development of nanocomposite dielectric films incorporating high-κ inorganic fillers has received considerable attention as an alternative to highly polarizable polymers and polymer blends. Such composite dielectric films hold promise for reducing power consumption, enhancing resilience, and improving device performance. − We describe here a “grafting from” strategy, wherein surface-passivating ligands of HfO 2 nanocrystals bearing pendant olefin moieties are polymerized with norbornene monomers to yield dense hybrid nanocomposite dielectrics with an active interphase.…”