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Tetragonal Nb-doped Pb(Zr0.3Ti0.7)O3 (PNZT) films with a lead oxide seeding layer were deposited on the Pt(111)/Ti/SiO2/Si(100) substrates by sol-gel processing. The as-grown PNZT films with thickness...
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SrTiO3 on piezoelectric PMN-PT(001) for application of variable strain

J. Appl. Phys. 104, 054108 (2008); doi:10.1063/1.2975167

Published 9 September 2008

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O. Bilani-Zeneli,1 A. D. Rata,1 A. Herklotz,1 O. Mieth,2 L. M. Eng,2 L. Schultz,1 M. D. Biegalski,3 H. M. Christen,3 and K. Dörr1
1IFW Dresden, Postfach 270116, 01171 Dresden, Germany
2Institut für Angewandte Physik, Technische Universität Dresden, 01069 Dresden, Germany
3Oak Ridge National Laboratory, Center for Nanophase Materials Sciences, P.O. Box 2008, Bethel Valley Rd., Oak Ridge, Tennessee 37831, USA
SrTiO3 (STO) is the most frequently used substrate material for complex oxide films. In this work, STO is explored as a buffer layer on piezoelectric pseudocubic Pb(Mg1/3Nb2/3)0.72Ti0.28O3(001) (PMN-PT) substrates, which serve to reversibly strain thin films. The STO buffer layer reduces the in-plane lattice parameter and allows for a better lattice matching to a broader range of thin film materials. STO films (30 nm) have been grown with epitaxial orientation on PMN-PT with an in-plane lattice parameter close to that of bulk STO. The substrate's rhombohedral domain structure has been imaged by atomic force microscopy. The related ferroelectric domain structure has been investigated by piezoresponse force microscopy. Within a domain, STO grows with a rather low roughness (rms<0.2  nm). The transfer of the piezoelectric substrate strain to the STO film and its variation with an applied electric field are studied using x-ray diffraction. The strain dependence of the electrical resistance is measured for a ferromagnetic manganite film grown on top of the STO. Both experiments confirm qualitatively that the STO buffer transfers the substrate strain into a functional film deposited on top. ©2008 American Institute of Physics
History: Received 27 March 2008; accepted 28 June 2008; published 9 September 2008
Permalink: http://link.aip.org/link/?JAPIAU/104/054108/1
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KEYWORDS and PACS

Keywords
PACS
  • 77.55.+f
    Dielectric thin films
  • 77.65.Ly
    Strain-induced piezoelectric fields
  • 77.80.Dj
    Ferroelectric domain structure; hysteresis
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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