The off-axis pyroelectric effect observed for lithium tetraborate

Authors

J. Ketsman, University of Nebraska - Lincoln
D. Wooten, Air Force Institute of Technology
Jie Xiao, University of Nebraska - Lincoln
Ya. B. Losovyj, University of Nebraska - Lincoln
Ya. V. Burak, Institute of Physical Optics
V. T. Adamiv, Institute of Physical Optics
A. Sokolov, Institute of Physical Optics
J. Petrosky, Air Force Institute of Technology
J. McClory, Air Force Institute of Technology
P. A. Dowben, University of Nebraska-LincolnFollow

Date of this Version

2010

Citation

Physics Letters A 374 (2010) 891–895

Comments

© 2009 Elsevier B.V.

This document is a U.S. government work and is not subject to copyright in the United States.

doi:10.1016/j.physleta.2009.12.012

Abstract

We find a pyroelectric current along the {110} direction of stoichiometric Li₂B₄O₇ so that the pyroelectric coefficient is nonzero but roughly 10⁻³ smaller than along the {001} direction of spontaneous polarization. Abrupt decreases in the pyroelectric coefficient along the {110} direction can be correlated with anomalies in the elastic stiffness C_33^D contributing to concept that the pyroelectric coefficient is not simply a vector but has qualities of a tensor, as expected. The time dependent surface photovoltaic charging suggests that an inverse piezoelectric effect occurs at the (110) surface but not the (100) surface. Both effects along the {110} direction or at the (110) surface are distinct the conventional as a bulk pyroelectric effect.