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Ferroelectric Thin Films of Bismuth‐Containing Layered Perovskites: Part III, SrBi2Nb2O9 and c‐Oriented Bi4Ti3O12 Template
Author(s) -
Du Xiaofeng,
Chen IWei
Publication year - 1998
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1998.tb02766.x
Subject(s) - coercivity , materials science , thin film , ferroelectricity , dielectric , bismuth , polarization (electrochemistry) , anisotropy , crystallization , mineralogy , condensed matter physics , nanotechnology , optoelectronics , chemical engineering , optics , chemistry , metallurgy , physics , engineering
Randomly and c‐oriented SrBi 2 Nb 2 O 9 thin films have been obtained by a metalorganic decomposition (MOD) method using a highly c‐oriented Bi 4 Ti 3 O 12 layer as a template. This templating procedure is generally applicable to other layered perovskites, and it has the advantage of lowering the temperature for crystallization and texture selection for these thin films. Moreover, the c‐oriented Bi 4 Ti 3 O 12 template can serve as a bottom electrode at the same time. Ferroelectric and dielectric properties measured for SrBi 2 Nb 2 O 9 films of different orientations reveal strong anisotropy following the general trend known for other layered perovskites. Systematic differences in polarization and coercive field can be consistently explained in terms of the different m values and the lack of lone‐pair electrons. The latter contribute to a higher polarization and a higher coercive field for SrBi 2 Nb 2 O 9 thin films.