Dielectric and piezoelectric properties of sol-gel derived lead magnesium niobium titanate films with different textures

Jeong Hwan Park, Fei Xu, Susan Trolier-McKinstry

Research output: Contribution to journalArticlepeer-review

76 Scopus citations

Abstract

The piezoelectric and dielectric constants for Pb(Mg1/3Nb2/3)O3-PbTiO3(PMN-PT, 70/30) films with different orientations were measured. PMN-PT films were deposited on Pt(111)-passivated silicon substrates using a modified sol-gel process. The room temperature dielectric constants K for the (100)-oriented films were 2500-2600, while K for (111)-oriented films were 1900-2000. In both cases tan δ was less than 0.03. The dependence of the piezoelectric coefficient d31of the PMN-PT films on the poling fields was investigated. The d31coefficients of (100)-oriented PMN-PT films were found to range from -28 to -69 pC/N with poling field. The (100)-oriented PMN-PT films showed larger piezoelectric coefficient than (111)-oriented films. The d33coefficients of the 1.5 μm thick (100) oriented PMN-PT films were ∼170-183 pC/N. The aging rate of -d31was ∼4%-10%/decade.

Original languageEnglish (US)
Pages (from-to)568-574
Number of pages7
JournalJournal of Applied Physics
Volume89
Issue number1
DOIs
StatePublished - Jan 1 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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