In-situ extended X-ray absorption fine structure study of electrostriction in Gd doped ceria

Roman Korobko, Alyssa Lerner, Yuanyuan Li, Ellen Wachtel, Anatoly I. Frenkel, Igor Lubomirsky

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34 Citations (Scopus)

Abstract

Studying electric field-induced structural changes in ceramics is challenging due to the very small magnitude of the atomic displacements. We used differential X-ray absorption spectroscopy, an elementally specific and spatially sensitive method, to detect such changes in Gd-doped ceria, recently shown to exhibit giant electrostriction. We found that the large electrostrictive stress generation can be associated with a few percent of unusually short Ce-O chemical bonds that change their length and degree of order under an external electric field. The remainder of the lattice is reduced to the role of passive spectator. This mechanism is fundamentally different from that in electromechanically active materials currently in use.

Original languageEnglish
Article number042904
JournalApplied Physics Letters
Volume106
Issue number4
DOIs
Publication statusPublished - Jan 26 2015

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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