Open AccessSTRUCTURE AND FERROELECTRICITY OF Ba0.8Sr0.2TiO3 THIN FILMS PREPARED BY A MODIFIED SOL-GEL PROCESSING
Author(s) -
Cheng Jian-Gong,
Xiangjian Meng,
Jun Tang,
Guo Shao-Ling,
Chu Jun-Hao
Publication year - 2000
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.49.1006
Subject(s) - materials science , tetragonal crystal system , ferroelectricity , thin film , sol gel , coercivity , scanning electron microscope , field emission microscopy , diffraction , analytical chemistry (journal) , nanotechnology , optoelectronics , optics , dielectric , crystal structure , composite material , crystallography , condensed matter physics , chemistry , physics , chromatography
Quality Ba0.8Sr0.2TiO3 (BST) thin films with a remnant polarization of about 3.5μC/cm2,and a coercive field of about 53kV/cm have been successfully prepared by a sol-gel processing using a 0.05mol/L precursor solution.X-ray diffraction and field emission scanning electron microscope investigations show that the BST films exhibit a tetragonal structure (c/a=1.009) and consist dominantly of large columnar grains of about 150nm in diameter.The observed good ferroelectricity and insulating property render the sol-gel derived BST thin films promising for uncooled infrared detector and thermal imaging applications.