Thumbnail
Access Restriction
Open

Author Allouche, B. ♦ Gagou, Y. ♦ Belboukhari, A. ♦ Le Marrec, F. ♦ El Marssi, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ATOMIC FORCE MICROSCOPY ♦ CRYSTAL GROWTH ♦ DEPOSITS ♦ ELECTRON DIFFRACTION ♦ ENERGY BEAM DEPOSITION ♦ FERROELECTRIC MATERIALS ♦ LASER RADIATION ♦ MAGNESIUM OXIDES ♦ NIOBATES ♦ PLATINUM ♦ PULSED IRRADIATION ♦ PULSES ♦ REFLECTION ♦ SUBSTRATES ♦ THIN FILMS ♦ TUNGSTEN BRONZE ♦ X-RAY DIFFRACTION
Abstract Highlights: • (001)KLN tetragonal tungsten bronze thin film has been successfully deposited on MgO substrate using PLD. • Smooth and droplets-free surface has been obtained as evidenced by RHEED and AFM. • Impedance spectroscopy shows Debye type dielectric relaxation. • The ferroelectric character of the obtained (001)KLN film has been evidenced using capacitance voltage measurement. - Abstract: Potassium lithium niobate K{sub 3}Li{sub 2}Nb{sub 5}O{sub 15} (KLN) with tetragonal tungsten bronze-type structure (TTB) thin film was successfully deposited on MgO substrate by pulsed laser ablation method. The substrate was coated by a perovskite conductive layer of La{sub 0.5}Sr{sub 0.5}CoO{sub 3}. X-ray diffraction revealed (001) orientation with low mosaicity. The oriented film had smooth and droplets-free surface as evidenced by reflection high electron energy diffraction and atomic force microscopy. Using Pt top electrode, dielectric measurements indicated stable dielectric permittivity of about 400 up to 10{sup 5} Hz. A dielectric relaxation was also observed. Moreover, the capacitance voltage measurements of the obtained (001)KLN film show ferroelectric behavior. Our results provide useful insights into the growth of tetragonal tungsten and other complex materials. These results will be useful for the growth and integration of epitaxial TTB thin films on perovskite and Si substrates.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-10-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 94


Open content in new tab

   Open content in new tab