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      Strain-induced phase transitions in epitaxial NaNbO3thin films grown by metal–organic chemical vapour deposition

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          Abstract

          Epitaxially strained NaNbO3films were grown by liquid-delivery spin metal–organic chemical vapour deposition on several oxide substrates, inducing tensile and compressive lattice strain. High-resolution X-ray diffraction measurements reveal that coherently grown compressively strained NaNbO3films on NdGaO3exhibit the orthorhombiccphase. With increasing in-plane strain a first structural phase transition to the monoclinicrphase and, further on, for films grown under tensile strain on rare earth scandates, a second phase transition to theaaphase, are observed. Our results are in good agreement with the pathway of phase transitions predicted by Diéguez, Rabe & Vanderbilt [Phys. Rev. B, (2005),72, 144101] for NaNbO3films.

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          Author and article information

          Journal
          JACGAR
          Journal of Applied Crystallography
          J Appl Crystallogr
          International Union of Crystallography (IUCr)
          0021-8898
          October 2012
          September 2012
          : 45
          : 5
          : 1015-1023
          Article
          10.1107/S0021889812035911
          © 2012

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