Enhanced Electromechanical Response in Sm and Nd Co-doped Ceria

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

doi:10.1016/j.mtla.2020.100728

Enhanced Electromechanical Response in Sm and Nd Co-doped Ceria

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

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

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 language	English
Article number	100728
Journal	Materialia
Volume	12
DOIs	https://doi.org/10.1016/j.mtla.2020.100728
State	Published - Aug 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020

Funding

This research was supported by DFF-Research project grants from the Danish Council for Independent Research, Technology and Production Sciences, June 2016, grant number 48293 (GIANT-E), and the European H2020-FETOPEN-2016-2017 project BioWings, grant number 801267.

Funders	Funder number
DFF-Research
Danish Council for Independent Research, Technology and Production Sciences	GIANT-E, 48293
European H2020-FETOPEN-2016-2017
Horizon 2020 Framework Programme	801267

Keywords

blocking barriers
co-doped ceria
electrostriction
ionic conductivity
oxygen vacancies

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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.",

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AU - Bowen, Jacob R.

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AU - Esposito, Vincenzo

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Enhanced Electromechanical Response in Sm and Nd Co-doped Ceria

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