Journal
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
Volume 120, Issue 1-3, Pages 64-67Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.mseb.2005.02.002
Keywords
barium stannate titanate; C-V curve; clockwise hysteresis loop; slim-waist or pinched hysteresis loop
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Reversible hysteresis loop, defined as integral of small signal dielectric constant with electrical field, represents the contribution of the reversible part of polarization. In barium stannate titanate ceramics, field dependence of small signal dielectric constant was abnormal. The subsequent mathematical integral showed an abnormal clockwise hysteresis loop in the temperature range of 10-40 degrees C. The ferroelectric hysteresis loop measured by Sawyer-Tower circuit showed slim-waist or pinched shape. This phenomenon may reveal abnormal domain switching mechanism and is believed to be related with the strong interaction between point defects and domain walls. (c) 2005 Elsevier B.V. All rights reserved.
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