Microstructure and ferroelectric properties of compositionally graded Nd-doped Bi4Ti3O12 thin films prepared by sol–gel method
Microstructure and ferroelectric properties of compositionally graded Nd-doped Bi4Ti3O12 thin films prepared by sol–gel method
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DOI：
10.1007/s10854-012-0651-7
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发表时间：
2012-02
期刊：
影响因子：
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通讯作者：
Changyong Liu;Yiping Gong;Dongyun Guo;Chuanbin Wang;Q. Shen;Lianmeng Zhang
中科院分区：
文献类型：
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作者：
Changyong Liu;Yiping Gong;Dongyun Guo;Chuanbin Wang;Q. Shen;Lianmeng Zhang
The compositionally graded Bi4−xNdxTi3O12(BNT) thin films were prepared on Pt/Ti/SiO2/Si substrates by sol–gel method. Their microstructure, ferroelectric and dielectric properties were investigated. The single-phase upgraded and downgraded BNT films were obtained with (117) preferred orientation. Compared to the homogeneous BNT films prepared by the same conditions, the remanent polarization (Pr) and permittivity (εr) of compositionally graded BNT films were significantly enhanced. The upgraded BNT film showed larger 2Pr(34.9 μC/cm2) andεr(509), and those of downgraded BNT film were 29.4 μC/cm2and 505. Bi element in the downgraded BNT film accumulated near the interface of film/Pt bottom electrode, which deteriorated the compositional gradient and resulted in decreasing 2Prandεrcompared to the upgraded BNT film.
