Formation of magnetic grains in ferroelectric Pb[Zr0.6Ti0.4]O-3 ceramics doped with Fe3+ above the solubility limit
Kleebe, HJ; Lauterbach, S; Silvestroni, L; Kungl, H; Hoffmann, MJ; Erdem, E; Eichel, RA
APPLIED PHYSICS LETTERS, 2009, Band 94, Heft 14, Artikel Nr. 142901
The effect of excess iron-doping in piezoelectric lead-zirconate-titanate (PZT) on the microstructure was investigated by means of transmission electron microscopy in conjunction with electron diffraction and energy dispersive x-ray spectroscopy analysis. Electron paramagnetic resonance (EPR) spectroscopy has been used to characterize the site of the iron functional centers. A crystalline secondary magnetic phase formed upon sintering, magnetoplumbite (PbFe12O19), has been unequivocally identified. Furthermore, the phase assemblage observed in the Fe3+-doped PZT 60/40 sample could be correlated with an exchange-coupled resonance in the EPR spectra.