Asha, A S; Dr.Jayaraj, M K(Cochin University of Science & Technology, December , 2007)
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Abstract:
The main objective of this thesis work is to optimize the growth conditions for
obtaining crystalline and conducting Lao.5Sro.5Co03 (LSCO) and
Lao.5Sro.5Coo.5.5Nio.5O3 (LSCNO) thin films at low processing temperatures. The
films are prepared by radio frequency magnetron sputtering under various
deposition conditions. The thin films were used as electrodes for the fabrication
of ferroelectric capacitors using BaO.7SrO.3 Ti03 (BST) and PbZro.52 Tio.4803 (PZT).
The structural and transport properties of the La1_xSrxCo03 and Lao.5Sro.5Co1_xNix03
are also investigated. The characterization of the bulk and the thin films were
performed using different tools. A powder X-ray diffractometer was used to
analyze the crystalline nature of the material. The transport properties were
investigated by measuring the temperature dependence of resistivity using a four
probe technique. The magnetoresistance and thermoelectric power were also used to investigate the transport properties. Atomic force microscope was used
to study the surface morphology and thin film roughness. The ferroelectric
properties of the capacitors were investigated using RT66A ferroelectric tester.
Description:
Department of Physics,
Cochin University of Science and Technology