Regensburg 2010 – scientific programme

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O: Fachverband Oberflächenphysik

O 11: Methods: Scanning probe techniques II

O 11.6: Talk

Monday, March 22, 2010, 16:15–16:30, H32

Lateral Piezoelectric Response at Domain Boundaries in Bulk Single Crystals — Florian Johann, Tobias Jungk, Martin Lilienblum, Akos Hoffmann, and •Elisabeth Soergel — Physikalisches Institut, Universität Bonn, Wegelerstrasse 8, 53115 Bonn

The lateral signal at domain boundaries using piezoresponse force microscopy has first been described by Wittborn et al. [1] and was later investigated by Scrymgeour et al. [2]. They assumed the signal to originate from the topographical slope of the surface at the domain boundary. A different approach by Jungk et al. [3] ascribed domain specific surface charge distributions to cause the signal. Calculations by Morozovska et al. [4] explained the signal by a sideways motion of the sample surface at the domain boundary. In this contribution, we try to clarify the situation by experimental data obtained on different materials and crystallographic cuts.

[1] J.Wittborn, C.Canalias, K.V.Rao, R.Clemens, H.Karlsson, and F.Laurell, Appl. Phys. Lett. 80, 1622 (2002). [2] D.A.Scrymgeour and V.Gopalan, Phys. Rev. B 72, 024103 (2005). [3] T.Jungk, A.Hoffmann, and E.Soergel, Appl. Phys. Lett. 89, 042901 (2006). [4] A.N.Morozovska, E.A.Eliseev, S.L.Bravina, and S.V.Kalinin, Phys. Rev. B 75, 174109 (2007).