Large Piezoelectricity and Ferroelectricity in Mn-Doped (Bi0.5Na0.5)TiO3-BaTiO3 Thin Film Prepared by Pulsed Laser Deposition

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• 作者：Qianru Lin ; Rui Ding ; Qian Li ; Yee Yan Tay ; Danyang Wang ; Yun Liu ; Yizhong Huang and Sean Li
• 刊名：Journal of the American Ceramic Society
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：99
• 期：7
• 页码：2347-2353
• 全文大小：1534K
• ISSN：1551-2916

文摘

Mn-doped (Bi_0.5Na_0.5)_0.94Ba_0.06TiO₃ (MnBNBT) thin films were prepared on SrRuO₃ (SRO)-coated (001) SrTiO₃ (STO) single crystal substrates by pulsed laser deposition under different processing conditions. Structural characterization (i.e., XRD and TEM) confirms the epitaxial growth of STO/SRO/MnBNBT heterostructures. Through the judicious control of deposition temperature, the defect level within the films can be finely tuned. The MnBNBT thin film deposited at the optimized temperature exhibits superior ferroelectric and piezoelectric responses with remanent polarization P_r of 33.0 μC/cm² and piezoelectric coefficient d₃₃ of 120.0 ± 20 pm/V.