2 documents found, page 1 of 1
High dielectric constant and capacitance in ultrasmall (2.5 nm) SrHfO3 perovski...
Karmaoui, Mohamed; Venkata Ramana, E.; Tobaldi, David M.; Lajaunie, Luc; Graca, Manuel P.; Arenal, Raul; Seabra, Maria P.; Labrincha, Joao A.Strontium hafnium oxide (SrHfO3) has great potential as a high-k gate dielectric material, for use in memories, capacitors, CMOS and MOSFETs. We report for the first time the dielectric properties (relative permittivity and capacitance) of SrHfO3 nanoparticles (NPs), as opposed to thin films or sintered bulk ceramics. These monodisperse, ultra-small, perovskite-type SrHfO3 nanocrystals were synthesised through ...
Novel hybrid multifunctional magnetoelectric porous composite films
Martins, Pedro Libânio Abreu; Lanceros-Méndez, S.; Goncalves, R.; Lopes, A. C.; Venkata Ramana, E.; Mendiratta, S. K.Novel multifunctional porous films have been developed by the integration of magnetic CoFe2O4 (CFO) nanoparticles into poly(vinylidene fluoride)-Trifuoroethylene (P(VDF-TrFE)), taking advantage of the synergies of the magnetostrictive filler and the piezoelectric polymer. The porous films show a piezoelectric response with an effective d33 coefficient of -22 pC/N-1, a maximum magnetization of 12 emu.g-1 and a m...