Local variations in defect polarization and covalent bonding in ferroelectric Cu2+-doped PZT and KNN functional ceramics at the morphotropic phase boundary†
Abstract
Cu2+-doped Pb[Zr0.54Ti0.46]O3 (PZT) and Cu2+-doped [K0.5Na0.5]NbO3 (KNN) ferroelectrics with a dopant concentration of 0.25 mol% were investigated by means of multi-frequency and multi-pulse electron paramagnetic resonance (