Dielectric losses in submicrometer barium titanate near the Curie temperature

L. N. Korotkov; W. M. Al Mandalawi; T. N. Korotkova; N. A. Emelianov; E. A. Zhmachenko

doi:10.3103/S1062873816090240

Dielectric losses in submicrometer barium titanate near the Curie temperature

Authors: Korotkov L.N.¹, Al Mandalawi W.M.¹, Korotkova T.N.², Emelianov N.A.³, Zhmachenko E.A.¹
Affiliations:
1. Voronezh State Technical University
2. Voronezh Institute of the RF Ministry of Internal Affairs
3. Kursk State University
Issue: Vol 80, No 9 (2016)
Pages: 1074-1076
Section: Proceedings of the VIII (XIII) International Seminar on the Physics of Ferroelastics
URL: https://journals.rcsi.science/1062-8738/article/view/184812
DOI: https://doi.org/10.3103/S1062873816090240
ID: 184812

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Abstract

Low-frequency dielectric losses (tanδ) in barium titanate ceramics with crystallite sizes of ~100 nm near the Curie temperature are studied. It is shown that the observed tanδ maximum is described by a low-frequency fluctuation mechanism of dielectric losses. An analysis of experimental data shows that the critical nucleus size in ultrafine material is smaller than the one in bulk barium titanate.