V. Bornand et S. Trolier-mckinstry, Phase development in pulsed laser deposited Pb[Yb1/2Nb1/2]O-3-PbTiO3 thin films, THIN SOL FI, 370(1-2), 2000, pp. 70-77
(1 - x) Pb[Yb1/2Nb1/2]O-3 - x PbTiO3 (PYbN-PT, x = 0.4 and 0.5) / SrRuO3 (S
RO) heterostructures have been prepared by pulsed laser deposition (PLD) on
< 100 >(pc)-oriented LaAlO3 (LAO) substrates (the subscript pc refers here
to the pseudo-cubic perovskite subcell). Careful control of both lead vola
tilization and pyrochlore formation during the growth appears to be essenti
al to obtain perovskite PYbN-PT thin films with good crystalline, electrica
l and ferroelectric properties. By utilizing PbO-enriched ceramic targets a
nd adjusting deposition parameters such as the laser frequency, the chamber
pressure, the target to substrate distance and/or the substrate temperatur
e, high-quality thin films can be successfully grown with a single out-of-p
lane < 001 >(pc) orientation and an in-plane heteroepitaxial arrangement of
[110], PYbN-PT // [110](pc). SrRuO3. When processed in the 560-660 degrees
C temperature range, with a dynamic O-3/O-2 pressure of 300-400 mTorr and
relatively high laser repetition rates, PYbN-PT films exhibit improved ferr
oelectric properties. The typical values of the remanent (P-r) and saturati
on (P-s) polarizations increase up to 50 and 80 mu C/cm(2), respectively. (
C) 2000 Published by Elsevier Science S.A. All rights reserved.