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Title: Optical, ferroelectric, and piezoresponse force microscopy studies of pulsed laser deposited Aurivillius Bi₅FeTi₃O₁₅ thin films

Bi₅FeTi₃O₁₅ (BFTO) based Aurivillius ferroelectric thin films were fabricated on strontium ruthanate coated amorphous fused silica substrates using pulsed laser deposition technique. Optical, ferroelectric, and piezoresponse properties of these thin films were investigated. The estimated refractive index (n) and extinction coefficient (k) for these films were in the range from 2.40 to 2.59 and 0.012 to 0.19, respectively. The bandgap of the BFTO thin layers was estimated to be 2.88 eV. Domain switching and hysteresis loops of BFTO films were studied utilizing piezoresponse force microscopy (PFM). The measured apparent polarization (P{sub r}) and coercive field (E{sub c}) for the samples were 20 μC/cm² and 250 kV/cm, respectively. The amplitude and phase hysteresis curves obtained from PFM characterization reveal that these films can be switched below 5 V. These results suggest that BFTO in thin film form is a promising material for photo ferroelectric and optoelectronic devices applications.
Authors:
 [1] ;  [2] ; ; ;  [1]
  1. Department of Physics and Institute for Functional Nanomaterials, University of Puerto Rico, P.O. Box 70377, San Juan, Puerto Rico 00936-8377 (United States)
  2. (India)
Publication Date:
OSTI Identifier:
22305795
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMORPHOUS STATE; BISMUTH COMPOUNDS; ELECTRO-OPTICAL EFFECTS; ENERGY BEAM DEPOSITION; FERROELECTRIC MATERIALS; HYSTERESIS; IRON COMPOUNDS; LASER RADIATION; OXYGEN COMPOUNDS; POLARIZATION; PULSED IRRADIATION; REFRACTIVE INDEX; RUTHENIUM COMPOUNDS; SILICA; STRONTIUM COMPOUNDS; SUBSTRATES; THIN FILMS; TITANATES