Accession Number : ADA292306

Title :   Investigation of the Characteristics of Ferroelectric Thin Films Deposited by Pulsed Laser Ablation.

Corporate Author : ARMY RESEARCH LAB WATERTOWN MA MATERIALS DIRECTORATE

Personal Author(s) : Sengupta, S. ; Sonnenberg, N. ; Vijay, D. P. ; Desu, S. B.

PDF Url : ADA292306

Report Date : DEC 1994

Pagination or Media Count : 13

Abstract : Ferroelectric thin films of barium strontium titanate (BSTO) have been deposited on bare and metallized substrates by the pulsed laser ablation method under different oxygen ambients (150 mT and 50 mT). Under an oxygen pressure of 150 mT, the film composition was similar to that of its ablation target composition, viz. Ba(0.6)Sr(0.4)TiO3. However, when the films were deposited under the lower oxygen pressure, x-ray diffraction studies showed the presence of a secondary phase. The electrical characteristics of the films were measured to examine the effect of the stoichiometry on the dielectric constant and tunability. jg

Descriptors :   *ABLATION, *THIN FILMS, *PULSED LASERS, *FERROELECTRIC MATERIALS, TUNABLE LASERS, SECONDARY, X RAY DIFFRACTION, LOW PRESSURE, SUBSTRATES, TARGETS, LASERS, ELECTRICAL PROPERTIES, OXYGEN, CERAMIC MATERIALS, DEPOSITION, DIELECTRIC PROPERTIES, BARIUM TITANATES, STOICHIOMETRY, DIFFRACTION ANALYSIS, PHASE SHIFT, STRONTIUM COMPOUNDS, METALLIZING.

Subject Categories : Solid State Physics
      Inorganic Chemistry
      Lasers and Masers
      Ceramics, Refractories and Glass

Distribution Statement : APPROVED FOR PUBLIC RELEASE