Issue 8, 2020

Electromechanical dopant–defect interaction in acceptor-doped ceria

Abstract

Oxygen defective cerium oxide CeO2−δ exhibits a non-classical giant electromechanical response that is superior to that of lead-based electrostrictors. In this work, we report the key-role of acceptor dopants, with different size and valence (Mg2+, Sc3+, Gd3+, and La3+), on polycrystalline bulk ceria. Different dopants tune the electrostrictive properties by changing the electrosteric dopant–defect interactions. We find two distinct electromechanical behaviors: when the interaction is weak (dopant-vacancy binding energy ≤0.3 eV), electrostriction displays a high coefficient (M33), up to 10−17 (m V−1)2, with strongly time-dependent effects. In contrast, we observe no time-dependent effects when the interaction becomes strong (≥0.6 eV).

Graphical abstract: Electromechanical dopant–defect interaction in acceptor-doped ceria

Supplementary files

Article information

Article type
Communication
Submitted
03 Aug 2020
Accepted
06 Oct 2020
First published
06 Oct 2020
This article is Open Access
Creative Commons BY-NC license

Mater. Adv., 2020,1, 2717-2720

Electromechanical dopant–defect interaction in acceptor-doped ceria

A. Kabir, V. Buratto Tinti, M. Varenik, I. Lubomirsky and V. Esposito, Mater. Adv., 2020, 1, 2717 DOI: 10.1039/D0MA00563K

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements