Study of the electric properties of PbTiO3–BiFeO3 multilayer film structure
Study of the electric properties of PbTiO3–BiFeO3 multilayer film structure
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DOI：
10.1088/0022-3727/41/9/095302
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发表时间：
2008-05
期刊：
影响因子：
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通讯作者：
Liu Hongri;Sun Yuxia;Wang Xiuzhang
中科院分区：
文献类型：
--
作者：
Liu Hongri;Sun Yuxia;Wang Xiuzhang
采用溶胶-凝胶法在600℃退火的LaNiO3/SiO2/Si衬底上制备了PbTiO3/BiFeO3 （PB膜）、BiFeO3/PbTiO3 （BP膜）多层结构膜和纯BiFeO3膜（BFO膜）。XRD结果表明，薄膜结晶良好，无杂质相存在。铁电性结果表明，在相同的外加电场下，PB膜和BP膜比BFO膜具有更大的极化。在500 kV cm−1下，PB膜、BP膜和BFO膜的双剩余极化分别为82.2µC cm−2、85.6µC cm−2和3.5µC cm−2。电介质性能研究表明，多层结构膜具有比BFO膜更大的介电常数和介电损耗。发现在多层结构薄膜中泄漏电流减小。
PbTiO3/BiFeO3 (PB film), BiFeO3/PbTiO3 (BP film) multilayer structural films and pure BiFeO3 film (BFO film) have been deposited on LaNiO3/SiO2/Si substrates by the sol–gel process annealed at 600 °C. XRD results indicate that the films are well crystallized and no impure phases are observed. The results of ferroelectricity show that the PB film and BP film have larger polarization than the BFO film under the same applied electric field. The double remanent polarizations of the PB film, the BP film and the BFO film are 82.2 µC cm−2, 85.6 µC cm−2 and 3.5 µC cm−2 under 500 kV cm−1, respectively. The dielectric property study shows that the multilayer structural films have a larger dielectric constant and dielectric loss than the BFO film. Leakage current is found to be reduced in the multilayer structural films.