Author： Shvartsman V. V. Dec J. Xu Z. K. Banys J. Keburis P. Kleemann W.
Publisher： Taylor & Francis Ltd
ISSN： 0141-1594
Source： Phase Transitions: A Multinational Journal, Vol.81, Iss.11-12, 2008-11, pp. : 1013-1021
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Abstract
Dielectric relaxation of BaTi1-xSnxO3 ceramics is investigated by means of dielectric spectroscopy. The gradual crossover from ferroelectric to relaxor behavior is characterized by vanishing of the contribution due to domain walls and appearance of relaxation related to reorientation of polar nanosized regions. Typical behavior of relaxors is observed only in ceramics with x = 0.30, while the compositions with 0.175 ≤ x ≤ 0.25 show coexistence of both ferroelectric and relaxor features. The relaxor properties are supposed to be due to both weak random fields and disorder inherent in pure BaTiO3.
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