Title :
Domain structure of PbTiO3 films grown on vicinal (001) SrTiO3
Author :
Theis, C.D. ; Schlom, D.G.
Author_Institution :
Dept. of Mater. Sci. & Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
Epitaxial PbTiO3 films have been grown on vicinal (001) SrTiO3 substrates by pulsed laser deposition. Vicinal SrTiO 3 substrates with misorientations up to 9° from (001) were used and the influence of the direction of misorientation on the resulting domain structure was studied. 4-circle x-ray diffraction analysis indicates that thin (40 nm) PbTiO3 films are completely c-axis oriented (rocking curve FWHM of 0.25° for the 002 reflection) and that thicker films (~200 nm) contain mixed a-axis and c-axis PbTiO3 domains due to twinning along {011} planes. The [100] axis of the a-axis domains are misoriented by 2.1° to 3.3° toward ⟨100⟩ substrate directions with respect to the [001] axis of the c-axis domains. In contrast to growth on well-oriented (001) SrTiO3 surfaces where the four equivalent tilts of the [100] axis of the a-axis domains are equally likely, on vicinal SrTiO3 the a-axis domains are preferentially oriented in an uphill direction with respect to the crystallographic miscut
Keywords :
electric domains; epitaxial layers; ferroelectric thin films; lead compounds; pulsed laser deposition; twinning; 4-circle X-ray diffraction; PbTiO3; SrTiO3; crystallographic miscut; domain structure; epitaxial films; pulsed laser deposition; twinning; vicinal (001) SrTiO3 substrates; Crystallography; Ferroelectric materials; Lead; Materials science and technology; Optical films; Optical pulses; Pulsed laser deposition; Sputtering; Substrates; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.602796
