Dielectric anomaly and low frequency dispersion in ferroelectric materials at high temperatures

• Published in: Journal of materials science Vol. 33; no. 6; pp. 1633 - 1637
• Main Authors: M'PEKO, J.-C, PORTELLES, J, CALDERON, F, RODRIGUEZ, G
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 1998; Springer Nature B.V
• Subjects: Barium titanates; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric properties of solids and liquids; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Dispersion; Electrical properties; Exact sciences and technology; Ferroelectric materials; Ferroelectricity; Low frequencies; Materials science; Niobates, titanates, tantalates, pzt ceramics, etc; Permittivity (dielectric function); Physics; Dielectric dispersion; Inorganic compounds; Ferroelectric materials; Ternary compounds; Transition element compounds; Anomaly; Barium titanates; Experimental study; Permittivity
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1023/A:1017580223934

A dielectric anomaly related to the observed departure from the Curie–Weiss law in several Aferroelectric materials has been characterized in this work in ferroelectric BaTiO3. The electrical properties of the material were investigated using the a.c. analysis technique. From the analysis of the permittivity versus frequency curves collected at various temperatures, we discuss the anomalous behaviour as a result of a low frequency dispersion phenomenon due to the characteristics of the conduction processes at the material inhomogeneities.