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Title: Contact-free pyroelectric measurements using x-ray photoelectron spectroscopy

Non-contact pyroelectricity measurements based on x-ray photoelectron spectroscopy (XPS) are presented. Applied to Lithium Tantalate crystals, we demonstrate how the XPS-derived surface potential provides a simple probe of the desired property, free of all top-contact related difficulties. In particular, the increase in Lithium Tantalate spontaneous polarization under cooling, an experimentally challenging feature, is evaluated. We further inspect the roll of surface contaminants and the control over trapped surface charge in 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.
Authors:
 [1] ;  [2]
  1. Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100 (Israel)
  2. Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 76100 (Israel)
Publication Date:
OSTI Identifier:
22218124
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 5; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CONTROL; COOLING; CRYSTALS; DIELECTRIC MATERIALS; ELECTRIC CHARGES; ELECTRICAL PROPERTIES; LITHIUM; LITHIUM COMPOUNDS; PIEZOELECTRICITY; POLARIZATION; PROBES; SURFACE CONTAMINATION; SURFACE POTENTIAL; SURFACES; TEMPERATURE DEPENDENCE; X-RAY PHOTOELECTRON SPECTROSCOPY