Growth of (111) One-Axis-Oriented Bi(Mg<sub>1/2</sub>Ti<sub>1/2</sub>)O<sub>3</sub> Films on (100)Si Substrates

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<jats:p> Films of a high-pressure perovskite phase, Bi(Mg<jats:sub>1/2</jats:sub>Ti<jats:sub>1/2</jats:sub>)O<jats:sub>3</jats:sub>, were prepared on (111)<jats:sub>c</jats:sub>-oriented SuRuO<jats:sub>3</jats:sub>-coated (111)Pt/TiO<jats:sub>2</jats:sub>/SiO<jats:sub>2</jats:sub>/(100)Si substrates. The perovskite Bi(Mg<jats:sub>1/2</jats:sub>Ti<jats:sub>1/2</jats:sub>)O<jats:sub>3</jats:sub> films had a (111) one-axis orientation, because their constituent grains were epitaxially grown on (111)<jats:sub>c</jats:sub>-oriented perovskite SrRuO<jats:sub>3</jats:sub> ones. The remanent polarization and piezoelectric constant measured at an applied electric field of 600 kV/cm were about 30 µC/cm<jats:sup>2</jats:sup> and 40 pm/V, respectively. A remarkable phase transition was not observed from room temperature to 350 °C in a (111) one-axis-oriented Bi(Mg<jats:sub>1/2</jats:sub>Ti<jats:sub>1/2</jats:sub>)O<jats:sub>3</jats:sub> film, suggesting that the Curie temperature of this film is above 350 °C. </jats:p>

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