Dresden 2006 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
DF: Dielektrische Festkörper
DF 1: Internal Symposium “Integrated Electroceramic Functional Structures”
DF 1.7: Talk
Monday, March 27, 2006, 11:50–12:10, M{\"U}L Elch
Domain structure of ferroelectric nanograins by piezoelectric force microscopy — •Serge Röhrig1, Frank Peter1, Andreas Rüdiger1, Sven Clemens2, Theo Schneller2, and Rainer Waser1,2 — 1Center of Nanoelectronic Systems for Information Technology, Research Center Jülich, 52425 Jülich, Germany — 2Institut für Werkstoffe der Elektrontechnik 2, RWTH Aachen, Sommerfeld Str. 24, 52074
Piezoelectric force microscopy in vertical and lateral operation has made tremendous progress in the characterization of ferroelectric nanostructures. We discuss some of our latest findings in laterally confined ferroelectrics of BaTiO3 on SrRuO3 and PbTiO3 on Pt. Special attention is devoted to the sample-tip interaction as lateral PFM picks up signals that are prohibited by symmetry in an otherwise ideal c-axis oriented system. Lead titanate nanograins are fabricated by chemical solution deposition and post-treated by chemical mechanical polishing to modify their size distribution. Their ferroelectric functionality is proven by inversion of the piezoelectric tensor. We give an outlook to an upcoming new technique of tip-enhanced Raman spectroscopy on ferroelectric nanoislands and discuss some key issues like heat dissipation and the detection of soft-modes.