INTEGRATION OF FERROELECTRIC BaTiO3 THIN FILMS DIRECTLY ON NI AND TI METALLIC TAPES FOR STRUCTURAL HEALTH MONITORING SYSTEMS AND ENERGY HARVEST APPLICATIONS

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Abstract:

Ferroelectric BaTiO3 thin films were fabricated directly on various metallic substrate materials such as Ni and Ti by using the pulsed laser for the development of structural health monitoring systems and energy harvest applications. Microstructure studies from x-ray diffraction and electron microscopy indicate that the as-grown BaTiO3 thin films have pure BaTiO3 crystal phase. The TEM studies indicate that the BaTiO3 films are composed of crystalline assemblage of nanopillars with average cross sections from 100 nm to 200 nm and can be directly integrated on the Ni tapes without the formation of NiO interlayer suggesting that this system can be developed for super-capacitor devices. The BaTiO3films have good interface structures and strong adhesion with respect to Ni and Ti substrates. Dielectric measurements have shown the hysteresis loop at room temperature in the film with a large remanent polarization, indicating that the ferroelectric domains have been created in the as-deposited BTO films. The successful integration of ferroelectric thin films directly on metallic materials has promised for the development of the structural health monitoring systems and energy harvest devices.

Keywords: ferroelectric films; integration; interface; metallic substrate; microstructure

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/10584580802540355

Affiliations: 1: Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas, USA 2: Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas, USA,The TcSUH, the University of Houston, Houston, TX, USA 3: Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas, USA 4: Department of Electrical & Computer Engineering, University of Texas at San Antonio, San Antonio, Texas, USA 5: Department of Mechanical Engineering, University of South Carolina, Columbia, SC, USA 6: US Army Research Laboratory, Aberdeen Proving Ground, MD, USA

Publication date: January 1, 2008

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