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Title: Stress induced enhanced polarization in multilayer BiFeO{sub 3}/BaTiO{sub 3} structure with improved energy storage properties

Present work reports the fabrication of a multilayer (5-layer) structure of BiFeO{sub 3}(BFO)/BaTiO{sub 3}(BTO) using spin-coating technique. The crystallographic structure, surface morphology and ferroelectric behavior of multilayer structure in metal-ferroelectric-metal capacitor have been studied. Le-Bail refinement of X-ray diffraction data revealed the formation of polycrystalline pure perovskite phase with induced stress. The values of remnant (P{sub r}) and saturation polarization (P{sub s}) for BFO/BTO multilayer structure are found to be 38.14 μC/cm{sup 2} and 71.54 μC/cm{sup 2} respectively, which are much higher than the corresponding values reported for bare BFO thin film. A large value of dielectric constant of 187 has been obtained for multilayer structure with a low leakage current density of 1.09 × 10{sup −7} A/cm{sup 2} at applied bias of 10 V. The BFO/BTO multilayer structure favors the enhanced energy storage capacity as compared to bare BFO thin film with improved values of energy-density and charge-discharge efficiency as 121 mJ/cm{sup 3} and 59% respectively, suggesting futuristic energy storage applications.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [1]
  1. Department of Physics and Astrophysics, University of Delhi, Delhi (India)
  2. (India)
  3. Physics Department, Miranda House, University of Delhi, Delhi (India)
  4. CSIR-National Physical Laboratory, Dr. K.S .Krishnan Marg, Delhi (India)
  5. Department of Applied Physics, Delhi Technological University, Delhi (India)
Publication Date:
OSTI Identifier:
22492154
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CRYSTAL STRUCTURE; ENERGY DENSITY; ENERGY STORAGE; FABRICATION; FERRITES; FERROELECTRIC MATERIALS; LAYERS; LEAKAGE CURRENT; MORPHOLOGY; PERMITTIVITY; POLARIZATION; POLYCRYSTALS; SPIN-ON COATING; STRESSES; SURFACES; THIN FILMS; TITANATES; X-RAY DIFFRACTION