Share Email Print
cover

Proceedings Paper

Thermal and mechanical effects on large field dielectric loss in lanthanum-doped lead zirconate titanate
Author(s): John A. Gallagher; Hwan Ryul Jo; Christopher S. Lynch
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Ferroelectric material losses in devices ranging from sonar transducers to energy harvesters result in the conversion of energy to heat. Under small amplitude sinusoidal drive, either electrical or mechanical, the losses are expressed in terms of a loss tangent. This study addressed the effects of temperature and bias stress on large field dielectric loss in the presence of thermal and mechanical loading in lanthanum-doped lead zirconate titanate, Pb0.92La0.08(Zr0.65Ti0.35)0.98O3 (PLZT 8/65/35). This loss is associated with domain wall motion. Large field dielectric loss was experimentally measured using a technique that matches the area within a unipolar electric displacement – electric field hysteresis loop to an equivalent area ellipse-shaped hysteresis loop. The results indicate that the dependence of dielectric loss on bias stress changes with the onset of a thermally induced transition to slim loop behavior. Stress causes the dielectric loss to increase at low temperature and decrease at high temperature. This is consistent with changes in remnant polarization and saturation of the unipolar electric field – electric displacement hysteresis loops.

Paper Details

Date Published: 3 April 2013
PDF: 7 pages
Proc. SPIE 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013, 868906 (3 April 2013); doi: 10.1117/12.2013750
Show Author Affiliations
John A. Gallagher, Univ. of California, Los Angeles (United States)
Hwan Ryul Jo, Univ. of California, Los Angeles (United States)
Christopher S. Lynch, Univ. of California, Los Angeles (United States)


Published in SPIE Proceedings Vol. 8689:
Behavior and Mechanics of Multifunctional Materials and Composites 2013
Nakhiah C. Goulbourne; Hani E. Naguib, Editor(s)

© SPIE. Terms of Use
Back to Top