Physics – Condensed Matter – Materials Science
Scientific paper
2003-07-10
Applied Physics Letters -- September 22, 2003 -- Volume 83, Issue 12, pp. 2414-2416
Physics
Condensed Matter
Materials Science
14 Pages, 3 Figures, Accepted by Applied Physics Letters
Scientific paper
10.1063/1.1613052
Epitaxial (001)-, (118)-, and (104)-oriented Nd-doped Bi4Ti3O12 films have been grown by pulsed-laser deposition from a Bi4-xNdxTi3O12 (x=0.85) target on SrRuO3 coated single-crystal (100)-, (110)-, and (111)-oriented SrTiO3 substrates, respectively. X-ray diffraction illustrated a unique epitaxial relationship between film and substrate for all orientations. We observed a strong dependence of ferroelectric properties on the film orientation, with no ferroelectric activity in an (001)-oriented film; a remanent polarization, 2Pr, of 12 microC/cm2 and coercive field, Ec, of 120 kV/cm in a (118)-oriented film; and 2Pr = 40 microC/cm2, Ec = 50 kV/cm in a (104)-oriented film. The lack of ferroelectric activity along the c-axis is consistent with the orthorhombic nature of the crystal structure of the bulk material, as determined by powder neutron diffraction.
Barber Z. H.
Dawber Matthew
Garg Anupam
Lightfoot Peter
Scott James F.
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