Polarization and piezoelectric properties of high-quality (Bi,Na)TiO3 crystals grown by high-oxygen-pressure flux method
2009 年 34 巻 1 号 p. 31-34
詳細
2009 年 34 巻 1 号 p. 31-34
Crystal growth at a high Po2 (oxygen pressure) is developed for Bi0.5Na0.5TiO3 single crystals based on defect chemistry at high temperatures. Bi0.5Na0.5TiO3 crystals grown at Po2 = 1 MPa show a saturated remanent polarization of 44 μC/cm2 along [110]cubic, suggesting a spontaneous polarization of 54 μC/cm2 along [111]cubic (polar direction) of rhombohedral Bi0.5Na0.5TiO3. High-Po2 heat treatments are demonstrated to be suitable for fabricating high-quality and high-performance ferroelectric and piezoelectric devices using Bi0.5Na0.5TiO3 crystals
