Influence of Uniaxial Tensile Stress on the Mechanical and Piezoelectric Properties of Short-period Ferroelectric Superlattice

Autor:	Wang Chunmei, Chen Changqing, Duan Yifeng, Tang Gang
Jazyk:	angličtina
Rok vydání:	2009
Předmět:	Mechanical property Piezoelectricity Ferroelectric superlattice Materials of engineering and construction. Mechanics of materials TA401-492
Zdroj:	Nanoscale Research Letters, Vol 5, Iss 2, Pp 448-452 (2009)
Druh dokumentu:	article
ISSN:	1931-7573 1556-276X
DOI:	10.1007/s11671-009-9497-1
Popis:	Abstract Tetragonal ferroelectric/ferroelectric superlattice under uniaxial tensile stress along the c axis is investigated from first principles. We show that the calculated ideal tensile strength is 6.85 GPa and that the superlattice under the loading of uniaxial tensile stress becomes soft along the nonpolar axes. We also find that the appropriately applied uniaxial tensile stress can significantly enhance the piezoelectricity for the superlattice, with piezoelectric coefficient d 33 increasing from the ground state value by a factor of about 8, reaching 678.42 pC/N. The underlying mechanism for the enhancement of piezoelectricity is discussed.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/ef638573627e4331a517132dabdf3e82 Zobrazit plný text záznamu Full text from SpringerLink View record in DOAJ