Title: Fabrication and ferroelectric properties of BiFeO3/LaNiO3 artificial superlattice structures grown by radio-frequency magnetron-sputtering
Authors: Liu, Yen-Ting
Chiu, Shang-Jui
Lee, Hsin-Yi
Chen, San-Yuan
Department of Materials Science and Engineering
Master and Ph.D. Program for Science and Technology of Accelrrator Light Source
Keywords: Superlattice;RF sputtering;X-ray scattering
Issue Date: 1-Feb-2013
Abstract: Symmetric superlattice structures of multiferroic BiFeO3 and conductive LaNiO3 sublayers were grown on a Nb-doped SrTiO3 substrate with radio-frequency magnetron-sputtering. The formation of a superlattice structure was confirmed from the appearance of satellite lines on both sides of the main line in the X-ray diffraction pattern. X-ray measurements show that these superlattice films become subject to greater tensile stress along the c-axis and to increased compressive stress parallel to the surface plane with a decreasing thickness of the sublayer. The smaller is the thickness of the sublayer, the greater is the crystalline quality and the strain state. The hysteresis loops show a large leakage current at frequencies of 0.5 and 1 kHz; the polarization decreases with an increasing frequency. (C) 2012 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.tsf.2012.07.073
ISSN: 0040-6090
DOI: 10.1016/j.tsf.2012.07.073
Volume: 529
Begin Page: 66
End Page: 70
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