کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1653005 | 1007653 | 2007 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Studies on the dielectric and relaxor behavior of sol–gel derived barium strontium zirconate titanate thin films Studies on the dielectric and relaxor behavior of sol–gel derived barium strontium zirconate titanate thin films](/preview/png/1653005.png)
The dielectric behavior of sol–gel derived Ba0.80Sr0.20(ZrxTi1−x)O3 (0.0 ≤ x ≤ 0.50) thin films is studied. A relaxor behavior is observed for x ≥ 0.35. The degree of relaxation increases with Zr content. The frequency dependence of the polar regions follows Vogel–Fulcher relation with a characteristic cooperative freezing at freezing temperature (Tf). Below Tf, a long range polarization ordering is likely to take place. The plausible mechanism of the relaxor behavior of BSZT thin films with Zr contents ≥ 0.35 has been proposed based on the measured temperature as well as frequency dependent dielectric data. The solid solution system is visualized as a mixture of Ti+ 4 rich polar regions and Zr+ 4 rich regions; with the increase in Zr content the volume fraction of the polar regions is progressively reduced. At and above 35.0 at.% Zr substitution the polar regions exhibit typical relaxor behavior.
Journal: Materials Letters - Volume 61, Issue 17, July 2007, Pages 3685–3688