Lead-free BNT-BKT-BT thin films by pulsed laser deposition process

Mehdi Hejazi, Ahmad Safari

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have studied the effect of deposition parameters on the microstructure and ferroelectric properties of pulsed laser deposited 0.88(Bi 0.5Na 0.5)TiO 3-0.08(Bi 0.5K 0.5)TiO 3-0.04BaTiO 3 thin films on SrRuO 3 coated SrTiO 3 substrates. The films were deposited at different repletion rates, substrate temperatures, and laser energies. It has been demonstrated that the film made at 800°C, 10 Hz, 400 mtorr and 1.2 J.cm -2 shows the best ferroelectric properties among the investigated films. The remnant polarization for this film was measured to be about 30 μC.cm -2. We have also discussed the electrical conduction mechanisms in the temperature range of 200-350 K. At low electric fields, the leakage mechanism is governed by the ohmic conduction. With increasing the applied filed, an abrupt increase in the leakage current was observed. This was attributed to a trap-filling process by the injected carries. At sufficiently high electric fields, the leakage current obeyed the Child's trap-free square law suggesting the space charge limited current was the dominant mechanism.

Original languageEnglish (US)
Title of host publication2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011
DOIs
Publication statusPublished - Oct 5 2011
Event2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011 - Vancouver, BC, Canada
Duration: Jul 24 2011Jul 27 2011

Other

Other2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011
CountryCanada
CityVancouver, BC
Period7/24/117/27/11

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All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Hejazi, M., & Safari, A. (2011). Lead-free BNT-BKT-BT thin films by pulsed laser deposition process. In 2011 International Symposium on Applications of Ferroelectrics and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials, ISAF/PFM 2011 [6014119] https://doi.org/10.1109/ISAF.2011.6014119