In the past few years ferroelectric has been the most studied material because of its potential application in non linear optics, sensors, microelectromechanical systems and non volatile memories. Among different ferroelectric materials, Lead Titanate (PT) found to be an attractive for pyroelectric, electro-optic and non linear optical applications because of its large polarization, high pyroelectric and electro-optic coefficients. It has also been considered promising materials for applications in modern nano-electronics, and MEMs. In today’s world nanostructures are gaining lots of attention due to its unique and novel properties as compared to bulk counterpart. However less efforts have been made to grow ferroelectric nanostructures especially in the form of vertically aligned nanorods. 

                        In this work nano-rods of ferroelectric lead titanate (PT) were fabricated on Si substrate by pulsed laser deposition using platinum layer as a catalytic template. The successive settlement of nano-particles one over the other results in the formation of elongated nano-rods under higher oxygen pressure. The diameter of nanorods was found to be 50-90nm. Raman scattering and SEM studies indicated that the fabricated PT nano-rods were of single phase and a-axis oriented. The temperature dependent Raman spectra confirming the ferroelectric nature of fabricated PT nano-rods, shows a shift in the soft phonon modes towards lower frequency with increasing temperature and disappear at about 523 K

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1. Investigation of structural and interfacial defects in oriented LiNbO₃ thin films