Curie-Weiss law of (Ba1-xSrx)TiO3 thin films prepared by chemical solution deposition

被引:19
作者
Hoffmann, S [1 ]
Waser, R
机构
[1] Rhein Westfal TH Aachen, IWE, D-52056 Aachen, Germany
[2] Forschungszentrum Julich, Inst Festkorperforsch, Res Ctr Julich, D-52425 Julich, Germany
来源
JOURNAL DE PHYSIQUE IV | 1998年 / 8卷 / P9期
关键词
D O I
10.1051/jp4:1998942
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The paper presents a study of the temperature dependence of the relative permittivity of (Bar(1-x)Sr(x))TiO3, x = 0...1, thin films grown by a chemical solution deposition (CSD) method on platinum coated silicon substrates. Glancing incidence X-ray diffraction analysis revealed a cubic or pseudocubic perovskite lattice for all films under investigation. The morphology of the polycrystalline BST thin films was varied between a fine grained and a columnar microstructure by adjusting the concentration of the spin-on solution. The thin film microstructure was studied on cross section samples by means of scanning electron microscopy. The temperature dependence of the relative permittivity of the whole series of BST thin films was measured by impedance analysis at 10 kHz in the temperature range from - 200 degrees C to 400 degrees C. The constants (C and T-c) of the Curie-Weiss law were determined for the thin films and compared to the values of bulk ceramics in the light of the mixing rule theory for a two component system.
引用
收藏
页码:221 / 224
页数:4
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