Strain, temperature, and electric-field effects on the phase transition and piezoelectric responses of K 0.5 Na 0.5 NbO 3 thin films

Meng Jun Zhou, Jianjun Wang, Long-qing Chen, Ce Wen Nan

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A KNbO 3 -based solid solution system is environmentally friendly with good electromechanical performance. This work established the misfit strain-strain and temperature-strain phase diagrams for K 0.5 Na 0.5 NbO 3 thin films and calculated the polarization switching, phase transition, and piezoelectric responses of K 0.5 Na 0.5 NbO 3 thin films under various strains, temperatures, and electric fields. The results show that the piezoelectric coefficient d 33 can be enhanced near the phase boundaries. For the ferroelectric phase with a nonzero out-of-plane polarization component, an optimal electric field is identified for maximizing d 33 , which is desired in applications such as thin-film piezoelectric micro-electromechanical systems, transducers for ultrasound medical imaging, and energy harvesting. The present results are expected to provide guidance for the future experimental study of K x Na 1- x NbO 3 thin films and the optimization of ferroelectric thin film-based devices.

Original languageEnglish (US)
Article number154106
JournalJournal of Applied Physics
Volume123
Issue number15
DOIs
StatePublished - Apr 21 2018

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temperature distribution
electric fields
thin films
polarization
microelectromechanical systems
transducers
solid solutions
phase diagrams
optimization
coefficients
temperature
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Strain, temperature, and electric-field effects on the phase transition and piezoelectric responses of K 0.5 Na 0.5 NbO 3 thin films",
abstract = "A KNbO 3 -based solid solution system is environmentally friendly with good electromechanical performance. This work established the misfit strain-strain and temperature-strain phase diagrams for K 0.5 Na 0.5 NbO 3 thin films and calculated the polarization switching, phase transition, and piezoelectric responses of K 0.5 Na 0.5 NbO 3 thin films under various strains, temperatures, and electric fields. The results show that the piezoelectric coefficient d 33 can be enhanced near the phase boundaries. For the ferroelectric phase with a nonzero out-of-plane polarization component, an optimal electric field is identified for maximizing d 33 , which is desired in applications such as thin-film piezoelectric micro-electromechanical systems, transducers for ultrasound medical imaging, and energy harvesting. The present results are expected to provide guidance for the future experimental study of K x Na 1- x NbO 3 thin films and the optimization of ferroelectric thin film-based devices.",
author = "Zhou, {Meng Jun} and Jianjun Wang and Long-qing Chen and Nan, {Ce Wen}",
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T1 - Strain, temperature, and electric-field effects on the phase transition and piezoelectric responses of K 0.5 Na 0.5 NbO 3 thin films

AU - Zhou, Meng Jun

AU - Wang, Jianjun

AU - Chen, Long-qing

AU - Nan, Ce Wen

PY - 2018/4/21

Y1 - 2018/4/21

N2 - A KNbO 3 -based solid solution system is environmentally friendly with good electromechanical performance. This work established the misfit strain-strain and temperature-strain phase diagrams for K 0.5 Na 0.5 NbO 3 thin films and calculated the polarization switching, phase transition, and piezoelectric responses of K 0.5 Na 0.5 NbO 3 thin films under various strains, temperatures, and electric fields. The results show that the piezoelectric coefficient d 33 can be enhanced near the phase boundaries. For the ferroelectric phase with a nonzero out-of-plane polarization component, an optimal electric field is identified for maximizing d 33 , which is desired in applications such as thin-film piezoelectric micro-electromechanical systems, transducers for ultrasound medical imaging, and energy harvesting. The present results are expected to provide guidance for the future experimental study of K x Na 1- x NbO 3 thin films and the optimization of ferroelectric thin film-based devices.

AB - A KNbO 3 -based solid solution system is environmentally friendly with good electromechanical performance. This work established the misfit strain-strain and temperature-strain phase diagrams for K 0.5 Na 0.5 NbO 3 thin films and calculated the polarization switching, phase transition, and piezoelectric responses of K 0.5 Na 0.5 NbO 3 thin films under various strains, temperatures, and electric fields. The results show that the piezoelectric coefficient d 33 can be enhanced near the phase boundaries. For the ferroelectric phase with a nonzero out-of-plane polarization component, an optimal electric field is identified for maximizing d 33 , which is desired in applications such as thin-film piezoelectric micro-electromechanical systems, transducers for ultrasound medical imaging, and energy harvesting. The present results are expected to provide guidance for the future experimental study of K x Na 1- x NbO 3 thin films and the optimization of ferroelectric thin film-based devices.

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