Journal of the Korean Vacuum Society (한국진공학회지)

The Korean Vacuum Society (한국진공학회)
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SUPPRESSION OF THE TETRAGONAL DISTORTION IN THIN Pb(Zr, Ti)$O_3$/MgO(100)

  • Kang, H.C. (Department of Materials Science and Engineering and Center for Electonic Materials Research Kwangju Institute of Science and Technology Kwangju Korea) ;
  • Noh, D.Y. (Department of Materials Science and Engineering and Center for Electonic Materials Research Kwangju Institute of Science and Technology Kwangju Korea) ;
  • Je, J.H. (Department of materials Science and Engineering Pohang University of Science and Technology Pohang Korea)
  • Published : 1997.10.01
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Abstract

The paraelectric cubic-to-ferroelectric tetragonal phase transition of the thin Pb(Zr, Ti)$O_3$ (PZT) films grown on MgO(001) substrate was investigated in a series of synchrotron x-ray scattering experiments. As the thickness of the film decreases the transition temperature and the amount of the tetragonal distortion were decreased continuously Different from only the c-domains were existent in the thinnest 25nm thick film. Based on this we propose a model for the domain structure of the tetragonal PZT/MgO(100) film that is very different from the ones suggested in literature. We attribute the suppression of the transition to the substrate field that prefers the c-type domains near the interface and suppresses the tetragonal distortion to minimize the film-substrate lattice mismatch.

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