(1 - x) Pb[Yb1/2Nb1/2]O3-x PbTiO3 (PYbN-PT, x = 0.4 and 0.5)/SrRuO3 (SRO) 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 subscell). Careful control of both lead volatilization and pyrochlore formation during the growth appears to be essential to obtain perovskite PYbN-PT thin films with good crystalline, electrical and ferroelectric properties. By utilizing PbO-enriched ceramic targets and adjusting deposition parameters such as the laser frequency, the chamber pressure, the target to substrate distance and/or the substrate temperature, high-quality thin films can be successfully grown with a single out-of-plane 〈001〉pc orientation and an in-plane heteroepitaxial arrangement of pc PYbN-PT//pc. SrRuO3. When processed in the 560-660°C temperature range, with a dynamic O3/O2 pressure of 300-400 mTorr and relatively high laser repetition rates, PYbN-PT films exhibit improved ferroelectric properties. The typical values of the remanent (Pr) and saturation (Ps) polarizations increase up to 50 and 80 μC/cm2, respectively.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry