Burcsu, Eric and Ravichandran, G. and Bhattacharya, K. (2000) Mechanics of large electrostriction in ferroelectrics. In: Smart structures and materials 2000. Active materials, behavior and mechanics. Proceedings of SPIE. No.3992. International Society for Optical Engineering , Bellingham, WA, pp. 296-304. ISBN 0-8194-3610-0 http://resolver.caltech.edu/CaltechAUTHORS:20131004-100114192
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The complex arrangement of domains observed in ferroelectric crystals is a consequence of multiple energy minima of the crystal free energy density. Since the total energy is a sum of the free energy, and electrical and mechanical work, switching between the different energetically equivalent domain states can be achieved by both electrical and mechanical means. For many ferroelectric materials, this results in an electrostrictive phenomenon resulting from domain switching. In the current study, the electrostrictive behavior of single crystal ferroelectric perovskites has been investigated experimentally. Experiments have been performed in which a crystal of barium titanate is exposed to a constant compressive stress and an oscillating electric field and global deformation is measured. The combined electromechanical loading results in a cycle of stress and electric field induced 90-degree domain switching. The domain switching cycle results in a measurable strain response theoretically limited by the crystallographic unit cell dimensions. Induced strains of more than 0.8% have been measured in barium titanate. Larger strains of up to 5% are predicted for other materials of the same class.
|Item Type:||Book Section|
|Additional Information:||© 2000 SPIE. We greatfully acknowledge the support of the Army Research Office (M.A. Zikry, Program Manager) under grant # DAAD 19-99-1-0319. K.B. would also like to acknowledge the support of the Airforce Office of Scientific Research under grant # MURI F49620-98-1-0433.|
|Subject Keywords:||ferroelectric crystals, barium titanate, domain switching, electrostriction|
|Official Citation:||Eric N. Burcsu ; Guruswaminaidu Ravichandran ; Kaushik Bhattacharya; Mechanics of large electrostriction in ferroelectrics. Proc. SPIE 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics, 296 (June 14, 2000); doi:10.1117/12.388214|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||04 Oct 2013 17:58|
|Last Modified:||04 Oct 2013 17:58|
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