Structural and electrical properties of K{sub 3}Li{sub 2}Nb{sub 5}O{sub 15} thin film grown by pulsed laser deposition

Journal Article · Sun Oct 15 04:00:00 EDT 2017 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.06.018· OSTI ID:22730420

Gagou, Y. ^[1]; Belboukhari, A. ^[2]; Le Marrec, F.; El Marssi, M. ^[1]

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1. LPMC, Université de Picardie Jules Verne, 33 rue saint Leu, 80039 Amiens cedex (France)
2. LMCN, F.S.T.G. Université Cadi Ayyad Marrakech (Morocco)

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.

• OSTI ID: 22730420
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 94; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 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