| AVS 60th International Symposium and Exhibition | |
| Applied Surface Science | Thursday Sessions |
| Session AS-ThP |
| Session: | Applied Surface Science Poster Session |
| Presenter: | H. Cohen, The Weizmann Institute of Science, Israel |
| Authors: | H. Cohen, The Weizmann Institute of Science, Israel D. Ehre, The Weizmann Institute of Science, Israel |
| Correspondent: | Click to Email |
A novel application of x-ray photoelectron spectroscopy (XPS) is presented, measuring pyroelectricity in a non-contact mode.1 We demonstrate, as a proof of concept, how the XPS-derived surface potential2,3 of Lithium Tantalate crystals provides a direct and simple probe of the desired property, free of all top-contact related difficulties. An experimentally challenging feature, the increase in Lithium Tantalate spontaneous polarization under cooling, is thus evaluated, proposing insight on the roll of surface contaminants and the control over trapped surface charge at the XPS vacuum environment. Our approach can be extended to other non-contact probes, as well as to measuring additional electrical properties, such as piezoelectricity and ferroelectricity.
References:
1. Ehre and Cohen, Appl. Phys. Lett., in press.
2. Cohen, Appl. Phys. Lett., 85, 1271 (2004).
3. I. Doron Mor et al., Nature 406, 382 (2000).