Title

Reversible Mn Segregation at the Polar Surface of Lithium Tetraborate

Authors

Christina L. Dugan
Robert L. Hengehold, Air Force Institute of Technology
Stephen R. McHale
Juan A. Colon Santana
John W. McClory, Air Force Institute of Technology
Volodymyr T. Adamiv, Institute of Physical Optics - Lviv, Ukraine
Yaroslav V. Burak, Institute of Physical Optics - Lviv, Ukraine
Ya B. Losovyj, University of Nebraska - Lincoln
Peter A. Dowben, University of Nebraska - Lincoln

Document Type

Article

Publication Date

4-22-2013

Abstract

We find Mn surface segregation for single crystals of Mn doped Li₂B₄O₇, nominally Li_1.95Mn_0.05B₄O₇(001), but as the temperature increases, evidence of this Mn surface segregation diminishes significantly. At room temperature, the surface photovoltaic charging is significant for this pyroelectric material but is quenched at a temperature well below that seen for the undoped Li₂B₄O₇ samples. The suppression of surface charging in the region of 120 °C that accompanies the temperature of Mn dissolution in the bulk of Li₂B₄O₇, i.e., the reversal of Mn surface segregation (215 °C), suggests that along the (001) direction, ionic transport must be considered as significant.

Comments

Publisher version at Scitation (AIP): https://doi.org/10.1063/1.4802760

All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY 4.0) license (http://creativecommons.org/licenses/by/4.0/).

http://sherpa.ac.uk/romeo/issn/0003-6951/ -- "12 months embargo."

DOI

10.1063/1.4802760

Source Publication

Applied Physics Letters

Recommended Citation

Dugan, C., Hengehold, R. L., McHale, S. R., Colón Santana, J. A., McClory, J. W., Adamiv, V. T., … Dowben, P. A. (2013). Reversible Mn segregation at the polar surface of lithium tetraborate. Applied Physics Letters, 102(16), 161602. https://doi.org/10.1063/1.4802760