Significant Enhancement of Piezoelectric Response in AlN by Yb Addition

• Published in: Materials Vol. 14; no. 2; p. 309
• Main Authors: Hirata, Kenji, Mori, Yuto, Yamada, Hiroshi, Uehara, Masato, Anggraini, Sri Ayu, Akiyama, Morito
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 09.01.2021; MDPI
• Subjects: Aluminum nitride; Binary system; Coupling coefficients; Crystal structure; Elastic properties; Enthalpy; First principles; Mathematical analysis; Parameter sensitivity; Piezoelectricity; Salt; Strain; Thin films; Wurtzite; thin film; nitride; first-principles calculation; piezoelectric material

This study employs first-principles calculations to investigate how introducing Yb into aluminum nitride (AlN) leads to a large enhancement in the material’s piezoelectric response (d33). The maximum d33 is calculated to be over 100 pC/N, which is 20 times higher than that of AlN. One reason for suc...