Otro
Ferroelectric and piezoelectric properties of bismuth layered thin films grown on (100) Pt electrodes
Registro en:
Journal of Materials Processing Technology. Lausanne: Elsevier B.V. Sa, v. 196, n. 1-3, p. 10-14, 2008.
0924-0136
10.1016/j.jmatprotec.2007.06.039
WOS:000252623200002
Autor
Simões, Alexandre Zirpoli
Riccardi, C. S.
Ries, A.
Ramirez, M. A.
Longo, Elson
Varela, José Arana
Resumen
The effect of film orientation on piezoelectric and ferroelectric properties of bismuth layered compounds deposited on platinum coated silicon substrates was investigated. Piezo-force microscopy was used to probe the local piezoelectric properties of Bi(4)Ti(3)O(12), CaBi(4)Ti(4)O(15) and SrBi(4)Ti(4)O(15) films. Our measurements on individual grains clearly reveal that the local piezoelectric properties are determined by the polarization state of the grain. A piezoelectric coefficient of 65 pm/V was attained after poling in a grain with a polar axis very close to the normal direction. The piezoelectric coefficient and the remanent polarization were larger for a-b axes oriented than for c-axis-oriented films. (c) 2007 Elsevier B.V All rights reserved.