Title :
Vortex polarization states in nanoferroelectrics
Author :
Rodriguez, B.J. ; Gao, X.S. ; Liu, L.F. ; Lee, W. ; Naumov, I.I. ; Bratkovsk, A.M. ; Hesse, D. ; Alexe, M.
Author_Institution :
Univ. Coll. Dublin, Dublin, Ireland
Abstract :
Two-dimensional arrays of ferroelectric lead zirconate titanate (PZT) nanodots fabricated using pulsed laser deposition (PLD) through ultrathin anodic aluminum oxide (AAO) membrane stencil masks have been investigated using piezoresponse force microscopy (PFM). Core-polarization states, which may indicate the presence of quasi-toroidal polarization ordering, have been observed. Existing theoretical data have been used to determine the signature of a vortex polarization state in a PFM experiment and compared to the measured data.
Keywords :
dielectric polarisation; ferroelectric materials; lead compounds; nanofabrication; nanostructured materials; piezoelectricity; pulsed laser deposition; 2D arrays; PFM; PZT; core-polarization states; ferroelectric lead zirconate titanate nanodots; nanoferroelectrics; piezoresponse force microscopy; pulsed laser deposition; quasitoroidal polarization ordering; ultrathin anodic aluminum oxide membrane stencil masks; vortex polarization states; Annealing; Atomic measurements; Microscopy; Nonhomogeneous media;
Conference_Titel :
Optoelectronic and Microelectronic Materials and Devices (COMMAD), 2010 Conference on
Conference_Location :
Canberra, ACT
Print_ISBN :
978-1-4244-7334-2
Electronic_ISBN :
1097-2137
DOI :
10.1109/COMMAD.2010.5699683
