Bibliographic Details
| Title: |
Flexoelectricity in amorphous hafnium oxide (HfO2) |
| Authors: |
Daniel Moreno-Garcia, Kaitlin M. Howell, Luis Guillermo Villanueva |
| Source: |
APL Materials, Vol 12, Iss 10, Pp 101112-101112-8 (2024) |
| Publisher Information: |
AIP Publishing LLC, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Biotechnology
LCC:Physics |
| Subject Terms: |
Biotechnology, TP248.13-248.65, Physics, QC1-999 |
| More Details: |
Flexoelectricity, inherent in all materials, offers a promising alternative to piezoelectricity for nanoscale actuation and sensing. However, its widespread application faces significant challenges: differentiating flexoelectric effects from those of piezoelectricity and other phenomena, verifying its universality across all material structures and thicknesses, and establishing a comprehensive database of flexoelectric coefficients across different materials. This work introduces a groundbreaking methodology that accurately isolates flexoelectricity from piezoelectric, electrostrictive, and electrostatic effects, with a detection threshold extending below 1 fC/m. The robustness of this method is demonstrated through its application to amorphous hafnium oxide, successfully measuring a flexoelectric coefficient of 105 ± 10 pC/m. This measurement signifies the first measurement of flexoelectricity in hafnia, as well as in any amorphous material. In addition, the study compiles a list of published flexoelectric coefficients, revealing an important insight. The relationship between the flexoelectric coefficient and the material’s relative permittivity is better approximated by a quadratic proportionality. This challenges the traditional linear assumption proposed in Kogan’s work and opens new avenues for future research in flexoelectric materials. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2166-532X |
| Relation: |
https://doaj.org/toc/2166-532X |
| DOI: |
10.1063/5.0220532 |
| Access URL: |
https://doaj.org/article/1b889c95bac244ad81d757d6aaafe5e8 |
| Accession Number: |
edsdoj.1b889c95bac244ad81d757d6aaafe5e8 |
| Database: |
Directory of Open Access Journals |
