Preparation of ferroelectric NaNbO(3) thin films on MgO substrate by pulsed laser deposition |
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Authors: | S Oda T Saito H Adachi T Wada |
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Affiliation: | Department of Materials Chemistry, Ryukoku University, Seta, Otsu 520-2194, Japan. |
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Abstract: | We successfully fabricated good quality NaNbO(3) (NN) films on MgO substrate by pulsed laser deposition using a K-Ta-O (KTO) buffer layer. An SrRuO(3) (SRO) lower electrode layer was deposited on a KTO buffer layer/(100)MgO substrate and then the NN film was deposited on top. X-ray diffraction showed that the SRO and NN films were epitaxially grown on (100)MgO substrate. Transmission electron microscopy showed a crystallographic relationship of [001](NN)//[001](MgO) between NN and MgO. The relative dielectric constant, epsilon(r), and dielectric loss, tan delta, of the film were 350 and 0.05 at 1 kHz, respectively. The polarization vs. electric field (P-E) hysteresis loop of the NN film was characteristic of ferroelectric behavior. |
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