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Epitaxial La0.5Sr0.5CoO3 electrode films for ferroelectric device applications |
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| Authors: | Jeffrey T Cheung Peter E D Morgan R Neugaonkar Mark Goorsk |
| Affiliation: | 1. Rockwell International Science Center , Thousand Oaks, California, 91360, USA;2. Dept. of Material Science and Engineering, UCLA , Los Angeles, CA, 90024, USA |
| Abstract: | Abstract We have grown high quality La0.5Sr0.5CoO3 thin films by Pulsed Laser Deposition. This material is a electrically conducting perovskite which can be used as structurally compatible electrodes for devices using ferroelectric materials such as Pb-La-Zr-Ti-O (PLZT). Oxygen stability was investigated under various annealing conditions. LSCO/PLZT/LSCO heterostructures were grown epitaxially on SrTiO3 (STO) and MgO substrates. P-E hysteresis loop was observed with Pr = 20 μC/cm2 and Ec = 24 kV/cm. Direct observation of the piezoelectric effect in PLZT was made by measuring the PLZT c-axis lattice constant under various electric fields. LSCO/STO superlattice was also grown by PLD. The superlattice showed excellent crystallinity with a Rutherford Backscattering (RBS) channeling minimum yield of only 3.6%. |
| Keywords: | pulsed laser deposition LaSrCoO PLZT conductive perovskite ferroelectric |