Subsurface nanodomains with in-plane polarization in uniaxial ferroelectrics via scanning force microscopy
authors Pertsev, NA; Kholkin, AL
nationality International
journal PHYSICAL REVIEW B
keywords DATA-STORAGE; THIN-FILMS; CRYSTALS; GENERATION; DOMAINS; BATIO3
abstract Ferroelectric nanodomains can be created by the application of a bias voltage to the sharp conducting tip of a scanning force microscope (SFM) contacting the sample surface. Since an inhomogeneous electric field created by an SFM tip has maximum intensity along the surface normal, in multiaxial ferroelectrics the polarization inside these domains also tends to orient perpendicularly to the surface. Here we show theoretically that unusual domains can be created in uniaxial ferroelectrics when the SFM tip is applied to the crystal surface parallel to the polar axis. These 180 degrees nanodomains have polarization directed along the surface and should appear in LiNbO3 and LiTaO3 crystals at moderate tip voltages well below 100 V. Calculations of equilibrium domain dimensions demonstrate that subsurface domains have the shape of a needle oriented along the polar axis.
publisher AMER PHYSICAL SOC
issn 1098-0121
year published 2013
volume 88
issue 17
digital object identifier (doi) 10.1103/PhysRevB.88.174109
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000327238200001
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journal analysis (jcr 2019):
journal impact factor 3.575
5 year journal impact factor 3.511
category normalized journal impact factor percentile 70.187
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