Back to Search
Start Over
Large piezoelectricity response in Li and Ti (or Zr) co-alloyed w-AlN.
- Source :
-
Journal of Applied Physics . 4/7/2022, Vol. 131 Issue 13, p1-7. 7p. - Publication Year :
- 2022
-
Abstract
- As one of the most important piezoelectric materials for piezoelectricity related devices, the performance of wurtzite-type aluminum nitride (w-AlN) is still inhibited by its low piezoelectric coefficients. Herein, we have proposed a new co-alloying w-AlN system by Li+ and Ti4+ (or Zr4+) in a ratio of 1:2 and systematically compared its piezoelectric properties with state-of-the-art Sc-alloyed w-AlN via the first-principle method. It is found that the co-alloyed w-AlN shows obvious advantages over Sc-alloyed w-AlN in nearly all aspects of piezoelectric performance. The piezoelectric strain coefficient (d33) of (LiTi2)0.375Al0.625N reaches 213.25 pC/N, about 8 times and 41 times that of Sc0.375Al0.625N and pure w-AlN, respectively. Additionally, the large enhancement of piezoelectricity of co-alloyed w-AlN was successfully related to the elastic softening, the increased Born effective charge (Z ∗) , and the decreased internal strain sensitivity ( d u d δ ). This work provides a new way to enhance the performance of incumbent piezoelectric materials by accessible elements instead of Sc. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PIEZOELECTRICITY
*PIEZOELECTRIC materials
*ALUMINUM nitride
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 131
- Issue :
- 13
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 156224905
- Full Text :
- https://doi.org/10.1063/5.0086355