Pressure and electric field effects on piezoelectric responses of KNbO 3

Linyun Liang, Y. L. Li, Fei Xue, Long Qing Chen

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5 Scopus citations

Abstract

The dielectric and piezoelectric properties of a KNbO 3 single crystal under applied hydrostatic pressure and positive bias electric field are investigated using phenomenological Landau-Ginzburg-Devonshire thermodynamic theory. It is shown that the hydrostatic pressure effect on the dielectric and piezoelectric properties is similar to temperature, suggesting a common underlying mechanism for the piezoelectric anisotropy and its enhancement. The stable phase diagram of KNbO 3 as a function of temperature and positive bias electric field is constructed. The maximum piezoelectric coefficient d 33 o varying with temperature and electric field is calculated.

Original languageEnglish (US)
Article number064106
JournalJournal of Applied Physics
Volume112
Issue number6
DOIs
StatePublished - Sep 15 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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