Flexoelectric Enhancement of Strain Gradient Elasticity Across a Ferroelectric-to-Paraelectric Phase Transition
We study the temperature dependent elastic properties of Ba<sub>0.8</sub>Sr<sub>0.2</sub>TiO<sub>3</sub> freestanding membranes across the ferroelectric-to-paraelectric phase transition using an atomic force microscope. The bending rigidity of thin membranes can be stiffer compared to stretching due to strain gradient elasticity (SGE). We measure the Young's modulus of freestanding Ba<sub>0.8</sub>Sr<sub>0.2</sub>TiO<sub>3</sub> drumheads in bending and stretching dominated deformation regimes on a variable temperature platform, finding a peak in the difference between the two Young's moduli obtained at the phase transition. This demonstrates a dependence of SGE on the dielectric properties of a material and alludes to a flexoelectric origin of an effective SGE.
Authors
- Harold Y. Hwang (ORCID: https://orcid.org/0000-0002-9230-3214)
- David Pesquera (ORCID: https://orcid.org/0000-0003-0681-3371)
- Varun Harbola (ORCID: https://orcid.org/0000-0002-5485-762X)
- Lane W. Martin (ORCID: https://orcid.org/0000-0003-1889-2513)
- Paul D. Ashby (ORCID: https://orcid.org/0000-0003-4195-310X)
- Ruijuan Xu (ORCID: https://orcid.org/0000-0001-5046-0599)
Institutions
- North Carolina State University (US)
- Lawrence Berkeley National Laboratory (US)
- SLAC National Accelerator Laboratory (US)
- Institut Català de Nanociència i Nanotecnologia (ES)
- Rice University (US)
- University of California, Berkeley (US)
- Stanford University (US)
Publication Details
- Journal
- Nano Letters
- Published
- 2024-08-12
- DOI
- https://doi.org/10.1021/acs.nanolett.4c02946
- Citations
- 9
- Primary Topic
- Nonlocal and gradient elasticity in micro/nano structures
- Type
- article
- Field-Weighted Citation Impact
- 1.05
Funders
- National Science Foundation
- U.S. Department of Energy
- Gordon and Betty Moore Foundation
- North Carolina State University
- “la Caixa” Foundation
- Centres de Recerca de Catalunya
- Institut Català de Nanociència i Nanotecnologia
- European Commission
- Generalitat de Catalunya
- Office of Science
- Agencia Estatal de Investigación
- Division of Materials Research
- Basic Energy Sciences
- Army Research Office
- H2020 Marie Skłodowska-Curie Actions
- Division of Materials Sciences and Engineering