The crystallization and dielectric tunability of Zn doped Na_0.5Bi_0.5TiO₃ thin films

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• 作者：Jin Qian^a ; Changhong Yang^a ; ^b ; ^{yang_changhong@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yajie Han^a ; Xueqing Hu^a ; Shuxin Li^a ; Fangying Jiao^a ; Xiongbin Du^a
• 关键词：A. Films ; B. Surfaces ; C. Dielectric properties ; Crystallization
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：42
• 期：1
• 页码：976-981
• 全文大小：1352 K

文摘

Na_0.5Bi_0.5Ti_1−xZn_xO_3−δ (NBTZn_x, x=0.005–0.04) thin films were deposited on indium tin oxide coated glass substrates by metal organic decomposition combined with sequential layer annealing. The effects of Zn²⁺ doping content on crystallization and dielectric tunability were mainly studied. All the thin films crystallize into a single perovskite structure with random orientation. Compared with the other films, the NBTZn_0.01 film exhibits a high dielectric constant and strong nonlinear dependence of the dielectric constant on applied field due to its well-crystallization and high densification. Furthermore, the effects of the electric field and frequency on the dielectric constant-electric field characteristic for NBTZn_0.01 film are discussed. The results show that NBTZn_0.01 thin film with an enhanced dielectric tunability of 39% can be a lead-free candidate for tunable component.