Functional oxides thin films are a class of materials which are embedded in a wide range of devices. Depending on the device/type of application, simple or complex oxide are used. We report on the properties of the WO3 and of several lead-free perovskite materials such as titanate-based (Ba(Ti0.8 Zr0.2)O3-x(Ba0.7 Ca0.3)TiO3 -BCTZ) and ferrite-based (BiFeO3-BFO; Y-doped BiFeO3- BYFO; LaFeO3- LFO) thin films growth by pulsed laser deposition (PLD). Applications in energy storage/generation, photonics, sensors, biology are discussed, depending on their properties as crystallinity, morphology, thickness.
Ellipsometry is a convenient means to ascertain electro-optic properties, and the null-type methods are particularly
so because they do not require a powermeter. Electro-optic materials like Strontium Barium Niobate (SBN) with the
symmetry axis normal or parallel to the surface are materials suitable for thin film integrated optic devices, therefore of
practical interest. For this reason we endeavoured to devise and to test experimental arrangements that measure the
birefringence of uniaxial structures with the symmetry axis parallel and perpendicular to the surface.
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