Heteroepitaxial growth of Pb(Mg1/3Nb2/3)O3-PbTiO3 thin films for integrated devices

0.65Pb(Mg1/3Nb2/3)O3-0.35PbTiO3 (PMN-PT) relaxor ferroelectric thin films have been grown on MgO single crystal and MgO/TiN buffered Si by pulsed laser deposition method. Structural characterization is performed by four-circle mode X-ray diffractometry. The effects of substrate temperature, deposition ambient oxygen pressure and postannealing on the crystallinity of the PMN-PT films are studied in details. Optimum condition for fabricating high structural quality and pyrochlore-free PMN-PT films is identified. Electrical measurements on the epitaxial PMN-PT films are performed with lattice matched conducting LaSrMnO3 (LSMO) bottom electrode and Au top electrode. Heteroepitaxial relationship of PMN-PT(100)LSMO(100)MgO(100) and PMN-PT(100)LSMO(100)MgO(100)TiN(100)Si(100) are obtained. The potential uses of PMN-PT films in integrated devices are discussed.Department of Applied Physic