Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published June 14, 2000 | Published
Book Section - Chapter Open

Mechanics of large electrostriction in ferroelectrics

Abstract

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.

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.

Attached Files

Published - Burcsu_2000p296.pdf

Files

Burcsu_2000p296.pdf
Files (2.4 MB)
Name Size Download all
md5:627968d5089e2201c5f38ade0b812e58
2.4 MB Preview Download

Additional details

Created:
August 19, 2023
Modified:
January 13, 2024