Ferroelectric domains in epitaxial PbTiO.sub.3./sub. films on LaAlO.sub.3./sub. substrate investigated by piezoresponse force microscopy and far-infrared reflectance

0367279 - FZÚ 2012 RIV US eng J - Článek v odborném periodiku
Simon, Elizabeth - Borodavka, Fedir - Gregora, Ivan - Nuzhnyy, Dmitry - Kamba, Stanislav - Hlinka, Jiří - Bartasyte, A. - Margueron, S.
Ferroelectric domains in epitaxial PbTiO₃ films on LaAlO₃ substrate investigated by piezoresponse force microscopy and far-infrared reflectance.
Journal of Applied Physics. Roč. 110, č. 8 (2011), 084115/1-084115/6. ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR GD202/09/H041; GA AV ČR KAN301370701; GA ČR GAP204/10/0616
Grant ostatní: GA UK(CZ) SVV-2011-263303
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: electric domain walls * epitaxial layers * ferroelectric ceramics * ferroelectric thin films * infrared spectra * lead compounds * MOCVD
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.168, rok: 2011

Domain structures of 100–300 nm thin epitaxial films of ferroelectric PbTiO3 grown by metalorganic chemical vapor deposition technique on LaAlO3 perovskite substrate have been investigated by piezoresponse force microscopy and infrared reflectance spectroscopy techniques. Normal-incidence reflectance spectra reveal both E- and A1-symmetry modes of PbTiO3. The latter ones demonstrate the presence of a minor fraction of a-domains (with in-plane orientation of the spontaneous polarization) in the film. The piezoresponse force microscopy images allow to get local insight in the complex nanodomain architecture composed by few hundred nm large areas of primarily c/a/c/a but also a1/a2/a1/a2 domain pattern types, with participation of all six tetragonal ferroelectric domain states and both 180° and 90° ferroelectric walls.
Trvalý link: http://hdl.handle.net/11104/0202019