Electrical properties of the ferroelectric bulk in europium-modified lead titanate ceramics

• Published in: Solid state communications Vol. 117; no. 8; pp. 489 - 493
• Main Authors: Martı́nez, O.Pérez, Piñar, F.Calderón, Barranco, A.Peláiz
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-01-2001; Elsevier
• Subjects: A. Ferroelectrics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; D. Dielectric response; D. Phase transitions; D. Piezoelectricity; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; Physics; D. Dielectric response; D. Phase transitions; 77.22.Gm; D. Piezoelectricity; 77.84.Dy; A. Ferroelectrics; 77.22.Ch; 77.80.Bh; Polarization; Crystal defects; Inorganic compounds; Lead titanates; Dielectric properties; Transition element compounds; Doped materials; Experimental study; Dielectric relaxation; Europium additions; Ferroelectric materials; Anisotropy; Piezoelectricity; Capacitance; Activation energy; Electric impedance
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/S0038-1098(00)00495-6

By using impedance spectroscopy technique we have investigated temperature dependence of various dielectric parameters in Pb
0.88Eu
0.08Ti
1−
y
Mn
y
O
3 ceramic system. Two contributions
R
1C
1
and
R
2C
2
, which contain the AC response of the ferroelectric bulk were observed for the first time in the modified lead titanate ceramics. Microstrains originating from structural defects in unpoled samples are responsible for the electrical inhomogeneity observed in the ferroelectric grains, which should worsen after poling process; this was followed by the piezoelectric anisotropy observed in modified lead titanate.