Low-temperature impedance and dielectric relaxation of NiO nanocrystals

Enhanced polarization and dielectricity in BaTiO3:NiO nanocomposite films modulated by the microstructure

“…Consequently, the contribution of charge carriers to the dielectric constant was rapidly decreased. 79 However, the substantial increase in the permittivity of the BTO:NiO nanocolumnar lms is very complex. On the other hand, Lee et al found that enhanced tetragonality for the FE lms gives rise to the higher permittivity.…”

A study on the origin of room temperature ferromagnetism in Ni1−Gd O nanoparticles

“…Although there is a decrease in intensity of all phonon bands, the intensity ratio between the 1LO and 2TO bands increases with the addition of Gd-concentration. This increase in intensity ratio can be attributed to the Ni-vacancies which exist in the Ni 1 À x Gd x O nanoparticles [20]. The 2TO band completely vanishes above 2% of Gd-doping.…”

Synthesis and conductivity of GdPO4 nanorods: Impacts of particle size and Ca2+ doping

“…On the other hand, the surface energy for nanostructures also reduces owing to the relatively larger specific surface areas that would adsorb other species like water molecules. As a result, hydration molecules may take part in the ionic conduction, contributing to the whole conductivity of the nanocrystals at low temperatures [7][8][9][10][11]. One of our group's recent work confirms that surface modification by phosphate species for yttrium-stabilized zirconia yields a high proton conductivity and improved thermal stability [12].…”

“…The conductivities of Ca 2+ doped GdPO 4 ·nH 2 O nanorods were determined by alternative current impedance spectroscopy, a useful technique that can distinguish the bulk conduction from the grain boundary conduction [7,40]. Typical complex impendence plots for GdPO 4 ·nH 2 O nanorods (11 nm) at different temperatures are shown in Fig.…”