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Low Dielectric Loss and Good Dielectric Thermal Stability of x Nd ( Zn 1/2 Ti 1/2 ) O 3 –(1− x ) Ba 0.6 Sr 0.4 TiO 3 Thin Films Fabricated by Sol–Gel Method
Author(s) -
Sun Xiaohua,
Yang Ying,
Zhang Qiaoling,
Hou Shuang,
Huang Caihua,
Hu Zongzhi,
Zou Jun,
Li Meiya,
Peng Tianyou,
Zhao Xingzhong
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12112
Subject(s) - materials science , dielectric , dielectric loss , thermal stability , thin film , ferroelectricity , figure of merit , sol gel , permittivity , grain size , temperature coefficient , composite material , analytical chemistry (journal) , nanotechnology , optoelectronics , chemical engineering , chemistry , chromatography , engineering
x Nd ( Zn 1/2 Ti 1/2 ) O 3 –(1− x ) Ba 0.6 Sr 0.4 TiO 3 ( x NZT – BST ) thin films were fabricated on Pt / Ti / SiO 2 / Si substrates by sol–gel method with x = 0, 3%, 6%, and 10%. The structures, surface morphology, dielectric and ferroelectric properties, and thermal stability of x NZT – BST thin films were investigated as a function of NZT content. It was observed that the introduction of NZT into BST decreased grain size, dielectric constant, ferroelectricity, tunability, and significantly improved dielectric loss and dielectric thermal stability. The corresponding reasons were discussed. The 10% NZT – BST thin film exhibited the least dielectric loss of 0.005 and the lowest temperature coefficient of permittivity ( TCP ) of 3.2 × 10 −3 /°C. In addition, the figure of merit ( FOM ) of x NZT – BST ( x = 3%, 6%, and 10%) films was higher than that of pure BST film. Our results showed that the introduction of appropriate NZT into BST could modify the dielectric quality of BST thin films with good thermal stability. Especially for the 3% NZT – BST thin film, it showed the highest FOM of 33.58 for its appropriate tunability of 32.87% and low dielectric loss of 0.0098.