Title

Reversible Mn Segregation at the Polar Surface of Lithium Tetraborate

Document Type

Article

Publication Date

4-22-2013

Abstract

We find Mn surface segregation for single crystals of Mn doped Li2B4O7, nominally Li1.95Mn0.05B4O7(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.
Abstract © AIP

Comments

© 2013 AIP Publishing LLC.

The "Link to Full Text" on this page opens the full article [HTML] with expandable figures, hosted at AIP Publishing. A PDF of the published article is available at the top of that page.

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in volume 102 of Applied Physics Letters as cited and linked below.

A publisher embargo was observed for this article.

DOI

10.1063/1.4802760

Source Publication

Applied Physics Letters

Share

COinS