Health & Environmental Research Online (HERO)


Print Feedback Export to File
334754 
Journal Article 
Vortex Polarization States in Nanoscale Ferroelectric Arrays 
Rodriguez, BJ; Gao, XS; Liu, LF; Lee, W; Naumov, II; Bratkovsky, AM; Hesse, D; Alexe, M 
2009 
1 
Nano Letters
ISSN: 1530-6984
EISSN: 1530-6992 
9 
3 
1127-1131 
Two-dimensional arrays of ferroelectric lead zirconate titanate (PZT) nanodots were fabricated using pulsed laser deposition through ultrathin anodic aluminum oxide membrane stencil masks. The static distribution of polarization configurations was investigated using in- and out-of-plane piezoresponse force microscopy (PFM). The observed presence of an in-plane polarization component in nominally (001) oriented PZT suggests the existence of a significant deviation from the regular tetragonal structure that allows the formation of complex core-polarization states. Core-polarization states may indicate the presence of quasi-toroidal polarization ordering. The experimental results are compared with a theoretical model to determine the fingerprint of a vortex polarization state in PFM. (English) 
Zirconate de plomb; Titanate de plomb; Résultat expérimental; Relation ordre; Transformation ordre désordre; Réseau quadratique; Méthode ablation laser; Dépôt laser pulsé; Nanomatériau; Nanopoint; PZT; Réseau(arrangement); Echelle nanométrique; Nanostructure; 8115F; 8107B; 6865; Al2O3; Pb(Zr,Ti)O3; O Pb Ti Zr; PbTiO3; Lead zirconates; Lead titanates; Experimental result; Ordering; Order-disorder transformations; Tetragonal lattices; Laser ablation technique; Pulsed laser deposition; Nanostructured materials; Nanodot; Arrays; Nanometer scale; Nanostructures; Resultado experimental; Relación orden; Nanopunto