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

Journal Article · Tue Oct 14 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4897556· OSTI ID:22305795

Kooriyattil, Sudheendran ^[1]; Barrionuevo, Danilo

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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)

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.

• OSTI ID: 22305795
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 14 Vol. 116; ISSN JAPIAU; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

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