Effect of fabrication conditions on phase formation and properties of epitaxial (PbMg{sub 1/3}Nb{sub 2/3}O{sub 3}){sub 0.67}-(PbTiO{sub 3}){sub 0.33} thin films on (001) SrTiO{sub 3}

Journal Article · Sun May 15 00:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4948793· OSTI ID:22611719

Boota, Muhammad ^[1]; Nguyen, Minh D.; Rijnders, Guus ^[1]; Lanzara, Giulia ^[2]

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1. MESA+ Institute for Nanotechnology, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500AE Enschede (Netherlands)
2. Engineering Department, University of Rome “ROMA TRE”, Via della Vasca Navale 79, 00146 Rome (Italy)

The pulsed laser deposition process of 300 nm thick films of Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}){sub 0.67}-(PbTiO{sub 3}){sub 0.33} on (001)-oriented SrTiO{sub 3} was studied by varying deposition pressure, substrate deposition temperature, laser fluence on the target and target-substrate distance. Perovskite phase pure, (001)-oriented, epitaxial smooth films were obtained in a narrow range of deposition parameters. The ferroelectric and dielectric properties of films fabricated within this parameter range still vary significantly. This shows the sensitivity of the system for growth conditions. The best film has a polarization value close to that expected for a (001) poled, stress free single crystal film. All films show deposition conditions dependent variations in the self-bias field. The self-bias is very stable during long cycling for films made at optimum deposition conditions. The piezoelectric coefficients of the films are strongly reduced with respect to bulk single crystal values due to the film clamping. The properties variations are ascribed to changes in the grain boundary properties in which film defects are expected to accumulate. Notably slight off-stoichiometry may cause localized screening charges, affecting specifically the polarization and dielectric constant.

• OSTI ID: 22611719
• Journal Information: AIP Advances, Vol. 6, Issue 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DEFECTS
ENERGY BEAM DEPOSITION
FERROELECTRIC MATERIALS
GRAIN BOUNDARIES
LASER RADIATION
LEAD COMPOUNDS
MAGNESIUM COMPOUNDS
MONOCRYSTALS
NIOBATES
PERMITTIVITY
PEROVSKITE
PIEZOELECTRICITY
POLARIZATION
SENSITIVITY
STOICHIOMETRY
STRESSES
STRONTIUM TITANATES
SUBSTRATES
THIN FILMS
TITANATES