Enhanced Electromechanical Response in Sm and Nd Co-doped Ceria

Ahsanul Kabir, Jacob R. Bowen, Maxim Varenik, Igor Lubomirsky, Vincenzo Esposito*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Highly oxygen defective cerium oxide, e.g., Gd-doped ceria, is a sustainable non-classical electrostrictor with electromechanical properties that are superior to lead-based piezoelectric metal oxides. Here, we report electrostriction in co-doped ceria (Sm, Nd) with a nominally low short-range vacancy-dopant association energy. Such a strategy results in a higher electrostrictive strain coefficient (M33), up to 10−17 (m/V)2 at lower-frequencies, and unexpected electromechanical strain saturation and relaxation effects. These outcomes support the hypothesis that electrostriction is strongly influenced by the local environment of oxygen vacancy and by the ionic migration blocking factors built-in the microstructure.
Original languageEnglish
Article number100728
JournalMaterialia
Volume12
ISSN1359-6454
DOIs
Publication statusPublished - 2020

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