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Neodymium titanate () is a ferroelectric as well as a pyroelectric material with a transition temperature of 1480 °C. Hence,offers potential to be utilized as high temperature pyroelectric sensor in both bulk and thin film form. In this work, bulkpowders were synthesized using solid state reaction method, which were later pressed into the pellets. Later, thin films ofwere deposited on commercially available platinized(111) silicon and Si(100) substrates via pulsed laser deposition technique. The huge c/a ratio (∼1.695) and the thermal expansion mismatch with most of the commonly used substrates like silicon and platinized silicon, results into crack formation inthin films. Crack formation onthin film, which deteriorates pyroelectric property offilm, was suppressed by the introduction ofbuffer layer between the film and substrate. The calculated value of thermal expansion coefficient ofis 2.86 × 10 −5  °C −1 . Moreover, thermally generated strain betweenfilm and platinum substrate was found to be around 2%. The piezoresponse force microscopy experiment confirms the existence of ferroelectric domains in the film. Pyroelectric coefficient ( p ) calculated from the pyrocurrent studies was estimated around 3.52 and 13.6 μC/m 2 K in the bulk and thin film, respectively.

Growth of crack free Nd 2 Ti 2 O 7 thin films using La 0.7 Sr 0.3 MnO 3±δ as a template layer for high temperature pyroelectric applications