Pb和La含量对La取代Pb(Zr0.65, Ti0.35)O3薄膜晶格构型的影响

2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2007-05-27 DOI:10.1109/ISAF.2007.4393175

H. Shima, K. Nishida, H. Funakubo, T. Iijima, T. Katoda, H. Naganuma, S. Okamura

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引用次数: 0

摘要

系统研究了Pb和La含量对La取代Pb(Zr0.65,Ti0.35)O3 (La- pzt)薄膜晶格构型的影响。采用化学溶液沉积法(CSD)在Pt/Ti/SiO2/Si衬底上制备了不同La和Pb含量的La- pzt薄膜。当La- pzt薄膜中Pb含量为125%(相对于化学计量值)时，当La含量超过3mol %时，La离子不仅取代了a位离子，还取代了b位离子。La取代b位点似乎会导致更大的单位细胞大小缩小。此外，我们发现在La含量为3 mol%的La- pzt薄膜中，从位置占用的角度来看，Pb含量为116 mol%(相对于化学计量值的120%)是最佳的。这表明过量的Pb阻止了La离子的a位取代。

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Influence of Pb and La Contents on the Lattice Configuration of La-Substituted Pb(Zr0.65, Ti0.35)O3 Films

The systematic investigation of the influence of Pb and La contents on the lattice configuration in La-substituted Pb(Zr0.65,Ti0.35)O3 (La-PZT) films was carried out. La-PZT films with various La and Pb contents were fabricated on Pt/Ti/SiO2/Si substrates by chemical solution deposition (CSD). In the La-PZT films with a Pb content ratio of 125% relative to a stoichiometric value, La ions were substituted for not only A-site ions but also B-site ions at La contents over 3 mol%. La substitution for B-site seems to cause larger reduction of the unit cell size. In addition, we found that in the La-PZT films with a La content of 3 mol%, the Pb content of 116 mol% (120% relative to a stoichiometric value) was optimum from the view point of site occupancy. This suggests that excess Pb prevented the A-site substitution of La ions.

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2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics

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