کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1797332 | 1023780 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of Mg doping on the dielectric and tunable properties of (Ba0.6Sr0.4)0.925K0.075TiO3 thin films fabricated by sol-gel method
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کلمات کلیدی
68.55.Ln81.15.Fg77.22.Gm77.55.+f - + 77.55 + f61.10.−I - 61.10.-I68.55.−a - 68.55.-aA1. Crystal structure - A1 ساختار کریستالیA1. X-ray diffraction - A1 پراش اشعه ایکسA1. Doping - A1. تغلیظA3. Polycrystalline deposition - A3 رسوبات پلی کریستالیB1. Perovskites - B1 PerovskitesB2. Dielectric materials - B2 مواد دی الکتریک
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
(Ba0.6Sr0.4)92.5%K7.5%TiO3 (BSTK) thin films doped by Mg from 0 to 6Â mol% were fabricated by sol-gel method on a Pt/TiO2/SiO2/Si substrate. The structure and surface morphology of Mg-doped BSTK thin films were investigated as a function of Mg concentration by X-ray diffraction and scanning electron microscopy. The dielectric measurements were conducted on metal-insulator-metal capacitors at the frequency from 100Â Hz to 1Â MHz and at room temperature. It is found that the Mg concentration in Mg-doped BSTK thin films has a strong influence on the material properties including surface morphology, dielectric and tunable properties. Increasing of Mg content leads to simultaneous decreasing of grain size, dielectric constant, dielectric loss and tunability of Mg-doped BSTK films. The effects of Mg doping on the microstructure, dielectric and tunable properties of Mg-doped BSTK thin films were analyzed. The BSTK thin film exhibited the highest dielectric constant of 1040 and the largest tunability of 73.6%. Mg-doped BSTK thin film (6Â mol%) showed the smallest dielectric loss of 0.0088 at 1Â MHz. Figure of merit (FOM) of Mg-doped BSTK thin films with the optimal Mg content of 4Â mol% showed maximum value of approximately 31.21 and its dielectric constant, dielectric loss and tunability were about 336, 0.014 and 44.45%, respectively. These results suggest that improved dielectric properties such as tunability and dielectric loss of 4Â mol% Mg-doped BSTK films show the potential in tunable devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 290, Issue 1, 15 April 2006, Pages 121-126
Journal: Journal of Crystal Growth - Volume 290, Issue 1, 15 April 2006, Pages 121-126
نویسندگان
Xiaohua Sun, Shishang Guo, Gengzhu Wu, Meiya Li, Xing-Zhong Zhao,