Structural and electrical properties of SrBi2Nb2O9 thin films prepared by chemical aqueous solution at low temperature

SrBi2Nb2O9 (SBN) thin films were prepared by the polymeric precursor method and deposited by dip coating onto Pt/Ti/SiO2/Si(100) substrates. The dip-coated films were specular and crack-free and crystallised during firing at 700 C. Microstructure and morphological evaluation were followed by grazing...

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Veröffentlicht in:	Materials letters 1999-07, Vol.40 (1), p.33-38
Hauptverfasser:	ZANETTI, S. M, ARAUJO, E. B, LEITE, E. R, LONGO, E, VARELA, J. A
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Dielectric, piezoelectric, ferroelectric and antiferroelectric materials Dielectrics, piezoelectrics, and ferroelectrics and their properties Exact sciences and technology Ferroelectricity and antiferroelectricity Liquid phase epitaxy deposition from liquid phases (melts, solutions, and surface layers on liquids) Materials science Methods of deposition of films and coatings film growth and epitaxy Niobates, titanates, tantalates, pzt ceramics, etc Physics Structure and morphology thickness Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Thin film structure and morphology
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Zusammenfassung:	SrBi2Nb2O9 (SBN) thin films were prepared by the polymeric precursor method and deposited by dip coating onto Pt/Ti/SiO2/Si(100) substrates. The dip-coated films were specular and crack-free and crystallised during firing at 700 C. Microstructure and morphological evaluation were followed by grazing incident X-ray diffraction (GIXRD), SEM and AFM. The films exhibited somewhat porous grain structure with rounded grains of about 100 nm. For the electrical measurements, gold electrodes of 300 micron in diameter were sputter deposited on the top surface, forming a metal-ferroelectric-metal (MFM) configuration. The remanent polarisation (Pr) and coercive field (Ec) were 5.6 microCoulomb/cm2 and 100 kV/cm, respectively. 16 refs.
ISSN:	0167-577X 1873-4979
DOI:	10.1016/S0167-577X(99)00045-2