Geometry of electromechanically active structures in Gadolinium - doped Cerium oxides

Journal Article · Sun May 15 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4952645· OSTI ID:22611514

Li, Yuanyuan; Zacharowicz, Renee; Kraynis, Olga; Lubomirsky, Igor ^[1]; Kas, Joshua ^[2]; Weng, Tsu-Chien; Sokaras, Dimosthenis ^[3]

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1. Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100 (Israel)
2. Department of Physics, University of Washington, Seattle, Washington 98195 (United States)
3. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States)

Local distortions from average structure are important in many functional materials, such as electrostrictors or piezoelectrics, and contain clues about their mechanism of work. However, the geometric attributes of these distortions are exceedingly difficult to measure, leading to a gap in knowledge regarding their roles in electromechanical response. This task is particularly challenging in the case of recently reported non-classical electrostriction in Cerium-Gadolinium oxides (CGO), where only a small population of Ce-O bonds that are located near oxygen ion vacancies responds to external electric field. We used high-energy resolution fluorescence detection (HERFD) technique to collect X-ray absorption spectra in CGO in situ, with and without an external electric field, coupled with theoretical modeling to characterize three-dimensional geometry of electromechanically active units.

• OSTI ID: 22611514
• Journal Information: AIP Advances, Vol. 6, Issue 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
CERIUM OXIDES
DETECTION
DOPED MATERIALS
ELECTRIC FIELDS
ENERGY RESOLUTION
FLUORESCENCE
GADOLINIUM ADDITIONS
GADOLINIUM OXIDES
OXYGEN
OXYGEN IONS
PIEZOELECTRICITY
SIMULATION
THREE-DIMENSIONAL CALCULATIONS
THREE-DIMENSIONAL LATTICES
VACANCIES
X-RAY SPECTRA