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  • Title: PLD prepared bioactive BaTiO3 films on TiNb implants.
    Author: Jelínek M, Vaněk P, Tolde Z, Buixaderas E, Kocourek T, Studnička V, Drahokoupil J, Petzelt J, Remsa J, Tyunina M.
    Journal: Mater Sci Eng C Mater Biol Appl; 2017 Jan 01; 70(Pt 1):334-339. PubMed ID: 27770900.
    Abstract:
    BaTiO3 (BTO) layers were deposited by pulsed laser deposition (PLD) on TiNb, Pt/TiNb, Si (100), and fused silica substrates using various deposition conditions. Polycrystalline BTO with sizes of crystallites in the range from 90nm to 160nm was obtained at elevated substrate temperatures of (600°C-700°C). With increasing deposition temperature above 700°C the formation of unwanted rutile phase prevented the growth of perovskite ferroelectric BTO. Concurrently, with decreasing substrate temperature below 500°C, amorphous films were formed. Post-deposition annealing of the amorphous deposits allowed obtaining perovskite BTO. Using a very thin Pt interlayer between the BTO films and TiNb substrate enabled high-temperature growth of preferentially oriented BTO. Raman spectroscopy and electrical characterization indicated polar ferroelectric behaviour of the BTO films.
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