Determination of the magnetoelectric coupling coefficient from temperature dependences of the dielectric permittivity for multiferroic ceramics Bi5Ti3FeO15

• Published in: Journal of experimental and theoretical physics Vol. 117; no. 5; pp. 875 - 878
• Main Authors: Bartkowska, J. A., Dercz, J.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.11.2013
• Subjects: Classical and Quantum Gravitation; Disorder; Elementary Particles; Order; Particle and Nuclear Physics; Phase Transition in Condensed System; Physics; Physics and Astronomy; Quantum Field Theory; Relativity Theory; Solid State Physics; Bismuth Oxide; Attritorial Mill; Dielectric Permittivity; Magnetic Subsystem; Magnetoelectric Coupling
• ISSN: 1063-7761; 1090-6509
• DOI: 10.1134/S1063776113120017

In the multiferroic materials, the dielectric and magnetic properties are closely correlated through the coupling interaction between the ferroelectric and magnetic order. We attempted to determine the magnetoelectric coupling coefficient from the temperature dependences of the dielectric permittivity for multiferroic Bi 5 Ti 3 FeO 15 . Multiferroic ceramics Bi 5 Ti 3 FeO 15 belong to materials of the Aurivillius-type structure. Multiferroic ceramics Bi 5 Ti 3 FeO 15 was synthesized via sintering the Bi 2 O 3 and Fe 2 O 3 mixture and TiO 2 oxides. The precursor material was ground in a high-energy attritorial mill for 5 hours. This material was obtained by a solid-state reaction process at T = 1313 K. We investigated the temperature dependences of the dielectric permittivity for the different frequencies. From the dielectric measurements, we determined the temperature of phase transition of the ferroelectric-to-paraelectric type at about 1013 K. Based on dielectric measurements and theoretical considerations, the values of the magnetoelectric coupling coefficient were specified.