【摘要】 压电响应力显微镜为铁电薄膜电畴的研究提供了一种有效的检测方法。本实验用压电响应力显微镜(PFM)对不同退火温度的(Pb,La)TiO3铁电薄膜进行表征,得到了各个样品相应的形貌像、面外电畴像和面内电畴像。结果表明,随退火温度升高,(Pb,La)TiO3铁电薄膜的表面形貌表现出从粘连到结晶较好,到出现抱团的变化过程;此外,随退火温度升高,铁电薄膜的自发极化强度先增强后减弱。通过对这一系列铁电薄膜电畴进一步研究得到:在625℃退火1 h后,(Pb,La)TiO3铁电薄膜以非铁电相为主;而在650℃和675℃退火1 h后,(Pb,La)TiO3铁电薄膜以铁电相为主。更多还原

【Abstract】 The piezoresponse force microscopy（PFM） is a useful method to study ferroelectric domains of ferroelectric films.Using PFM,the topography, OPP and IPP of（Pb,La）TiO₃ samples after annealing at different temperatures were studied,respectively.The results indicated that the topography of（Pb,La）TiO₃ films changed form conglutination to good-crystallinty and then combination together as the annealing temperature increased.The spontaneous polarization of ferroelectric films was strengthened and then weakened with the increasing of annealing temperature.In addition,the（Pb,La）TiO₃ film was mainly in a non-ferroelectric phase after annealing for 1 h at 625℃.However,the（Pb,La）TiO₃ film was mainly in an ferroelectric phase after annealing for 1h at 650℃ and 675 ℃,respectively.更多还原