Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 36, Issue 10, Pages 2453-2460Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2016.03.002
Keywords
Relaxor ferroelectric; Strain; Phase transition; Domain switching
Categories
Funding
- National Natural Science Foundation of China [51472069, U1432113, 50402079]
- Anhui Provincial Natural Science Foundation [1508085JGD04]
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A low-field driven high electromechanical strain response (large-signal d(33)* of similar to 1100 pm/V at 3.5 kV/mm) was found in a new (0.75-x)BiFeO3-0.25PbTiO(3)-xPb(Mg1/3Nb2/3)O-3 ternary relaxor ferroelectric ceramic. In-situ synchrotron X-ray diffraction measurements suggested that such a large strain be ascribed to a collective effect of electric field induced PNRs' growth, domain switching and rhombohedral-tetragonal (R-T) phase transition with increasing fields, among which ergodic PNRs' growth into R ferroelectric microdomains dominated the fastest increase of strains and the formation of the maximum strain hysteresis. Most interestingly, obviously enhanced R domain orientation along the electric field direction was believed to make a unique contribution as a result of its slightly reduced lattice distortion, compared with other Bi-containing relaxor ferroelectrics. An illustration of the domain morphology evolution in an ergodic relaxor was depicted to disclose the formation of strain hysteresis based on the delay in dynamics during electric cycling. (C) 2016 Elsevier Ltd. All rights reserved.
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