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Integrated Ferroelectrics
An International Journal
Volume 106, 2009 - Issue 1
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Original Articles

THz REFLECTIVITY SPECTROSCOPY OF TUBULAR PZT NANOSTRUCTURES

J. BANYS Vilnius University, Sauletekio Str. 9, LT-10222, Vilnius, Lithuania
,
M. IVANOV Vilnius University, Sauletekio Str. 9, LT-10222, Vilnius, Lithuania
,
R. ADOMAVICIUS Semiconductor Physics Institute, A. Gostauto str. 11, LT-01108, Vilnius, Lithuania
,
A. KROTKUS Semiconductor Physics Institute, A. Gostauto str. 11, LT-01108, Vilnius, Lithuania
,
J. MACUTKEVIC Semiconductor Physics Institute, A. Gostauto str. 11, LT-01108, Vilnius, Lithuania
,
J. SCOTT Department of Earth Sciences, University of Cambridge, CB2 3EQ, Cambridge, United Kingdom
&
H. J. FAN Division of Physics and Applied Physics, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
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Pages 17-22 | Received 13 May 2009, Published online: 20 Sep 2010
 
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ABSTRACT

We report the time domain THz reflectivity spectroscopy results of lead zirconate-titanate nanotubes arrays standing normal to the Si subtrates. The observed reflectivity spectra correspond to the resonance dielectric dispersion, which is attributed mainly to the lowest frequency optical phonon typical for bulk PZT. The transverse phonon frequency is lower than in bulk PZT, most probably due to the influence of the substrate.

ACKNOWLEDGMENT

We thank Dr. A. Langner, Max Planck Institute of Microstructure Physics (Germany), for providing the Si substrates. The work in Cambridge, Vilnius, Aveiro, and Ljubljana was all supported by EU STREP “Multiceral.”

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