PLD prepared bioactive BaTiO.sub.3./sub. films on TiNb implants

0473792 - FZÚ 2018 RIV CH eng J - Journal Article
Jelínek, Miroslav - Vaněk, Přemysl - Tolde, Z. - Buixaderas, Elena - Kocourek, Tomáš - Studnička, Václav - Drahokoupil, Jan - Petzelt, Jan - Remsa, Jan - Tyunina, Marina
PLD prepared bioactive BaTiO₃ films on TiNb implants.
Materials Science & Engineering C-Materials for Biological Applications. Roč. 70, Jan (2017), s. 334-339. ISSN 0928-4931. E-ISSN 1873-0191
R&D Projects: GA ČR(CZ) GA15-05864S; GA ČR(CZ) GA15-01558S
Institutional support: RVO:68378271
Keywords : BaTiO₃ * thin films * pld * implants * TiNb * ferroelectricity
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 5.080, year: 2017

BaTiO3 (BTO) layers were deposited by pulsed laser deposition (PLD) on TiNb, Pt/TiNb, Si (100), andfused silica substrates using various deposition conditions. Polycrystalline BTO with sizes of crystallites in the range from 90 nm to 160 nm was obtained at elevated substrate temperatures of (600 degrees C-700 degrees C). With increasing deposition temperature above 700 degrees 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 fornied. 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.
Permanent Link: http://hdl.handle.net/11104/0270930