skip to main content

SciTech ConnectSciTech Connect

Title: Influence of piezoelectric strain on the Raman spectra of BiFeO{sub 3} films deposited on PMN-PT substrates

BiFeO{sub 3} epitaxial thin films were deposited on piezoelectric 0.72Pb(Mg{sub 1/3}Nb{sub 2/3})O{sub 3}-0.28PbTiO{sub 3} (PMN-PT) substrates with a conductive buffer layer (La{sub 0.7}Sr{sub 0.3}MnO{sub 3} or SrRuO{sub 3}) using pulsed laser deposition. The calibration of the strain values induced by the electric field applied on the piezoelectric PMN-PT substrates was realised using X-Ray diffraction measurements. The method of piezoelectrically induced strain allows one to directly obtain a quantitative correlation between the strain and the shift of the Raman-active phonons. This is a prerequisite for making Raman scattering a strong tool to probe the strain coupling in multiferroic nanostructures. Using the Poisson's number for BiFeO{sub 3}, one can determine the volume change induced by strain, and therefore the Grüneisen parameters for specific phonon modes.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [3]
  1. TU Bergakademie Freiberg, Institute of Theoretical Physics, 09596 Freiberg (Germany)
  2. Institute of Physics, Martin-Luther-University Halle-Wittenberg, 06099 Halle (Germany)
  3. (Germany)
  4. (United States)
Publication Date:
OSTI Identifier:
22492703
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 4; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; BISMUTH COMPOUNDS; BUFFERS; CORRELATIONS; COUPLING; DEPOSITS; ELECTRIC FIELDS; ENERGY BEAM DEPOSITION; EPITAXY; IRON OXIDES; LANTHANUM ALLOYS; LASER RADIATION; LAYERS; LEAD COMPOUNDS; MAGNESIUM COMPOUNDS; NANOSTRUCTURES; NIOBIUM COMPOUNDS; OZONE; PHONONS; PIEZOELECTRICITY; PULSED IRRADIATION; RAMAN EFFECT; RAMAN SPECTRA; RUBIDIUM OXIDES; STRAINS; STRONTIUM COMPOUNDS; SUBSTRATES; THIN FILMS; TITANIUM COMPOUNDS; X-RAY DIFFRACTION