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

Document Type

Article

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.