Ferroelectric and piezoelectric response in (100)-oriented Mn-doped Bi0.5Na0.5TiO3–BaTiO3 thin films
2020
Li, Zihao | Huang, Xiaoli | Wang, Yuchun | Tang, Yanxue | Zhao, Xiangyong | Wang, Feifei | Wang, Tao | Shi, Wangzhou | Duan, Zhihua
In this work, high-quality Mn-doped 0.935Bi₀.₅Na₀.₅TiO₃–0.065BaTiO₃ (Mn-BNBT) ferroelectric film was prepared on the SrRuO₃-buffered (100)-oriented SrTiO₃ single-crystal substrate using pulsed laser deposition method. The phase structure, morphology, domain and electrical properties were studied. Large remnant polarization Pᵣ up to 35 μC/cm², moderate dielectric constant ɛ₃₃ᵀ /ɛ₀ of 800 and low dielectric loss tanδ of 0.037 at 1 kHz was obtained at room temperature along with excellent local piezoelectric response. The temperature dependence of the ferroelectric hysteresis loop measurements indicates the ferroelectric long-range order can be sustain as high as 150 °C. The excellent global properties make the present Mn-BNBT thin film quite potential in environmental-friendly piezoelectric integrated device applications.
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