Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31724
Title: Aging-induced, defect-mediated double ferroelectric hysteresis loops and large recoverable electrostrains in Mn-doped orthorhombic KNbO3-based ceramics
Authors: Feng, Z
Or, SW 
Keywords: Aging
Defects
Double ferroelectric hysteresis loop
Lead-free ceramics
Recoverable electrostrains
Issue Date: 2009
Publisher: Elsevier
Source: Journal of alloys and compounds, 2009, v. 480, no. 2, p. l29-l32 How to cite?
Journal: Journal of alloys and compounds 
Abstract: Double ferroelectric hysteresis (P-E) loops and large recoverable electrostrains of >0.13% at 5 kV/mm are observed in aged Mn-doped orthorhombic KNbO3-based [K(Nb0.90Ta0.10)O3] lead-free ceramics over a wide temperature range of 25-140 °C. The observations are found to have striking similarities to tetragonal ferroelectrics, besides following a point defect-mediated reversible domain switching mechanism of aging driven by a symmetry-conforming short-range ordering (SC-SRO) of point defects. Such aging effects, being insensitive to crystal structure and constituent ionic species, provide a useful way to enhance electromechanical properties of lead-free ferroelectric material systems.
URI: http://hdl.handle.net/10397/31724
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2009.02.043
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