Position and Temperature Dependence of Pyroelectricity in Domain-Engineered Stoichiometric and Congruent LiTaO3

Published

March 15, 2003

Author(s)

John H. Lehman, Chris Pannell

Abstract

Domain-engineered bicell (parallel compensated) pyroelectric detectors were constructed from stoichiometric and congruent lithium tantalate. The variation of the pyroelectric current response of these detectors was investigated as a function of temperature and position. We define a pyroelectric response gradient Π, which, near boundary of antiparallel domains, is asymmetric and increases to 4 % K^-1 in the poled half of the congruent LiTaO₃ bicell. The Π variation in the stoichiometric LiTaO₃ bicell was also asymmetric and varied only 1 % K^-1. The contribution of the primary, secondary, and tertiary pyroelectric effects are discussed along with a summary of the stress and strain in the heated detector disk.

Citation

Ferroelectrics

Pub Type

Journals

Keywords

Congruent, Lithium Niobate, Lithium Tantalate, Pyroelectricity, Stoichiometric, Strain, Temperature, Tertiary Pyroelectricity

Citation

Lehman, J. and Pannell, C. (2003), Position and Temperature Dependence of Pyroelectricity in Domain-Engineered Stoichiometric and Congruent LiTaO₃, Ferroelectrics (Accessed April 19, 2024)