2026-10-11T21:06:50Z https://www.scidb.cn/oai

10.57760/sciencedb.05385 2022-10-26T18:35:28Z

2022-10-26 Electrical property and phase transition analysis of KNN-based leadfree ferroelectric film doi:10.57760/sciencedb.05385 en The electrical properties, phase construction, thermal stability and phase transition behavior are investigated in 0.95(K0.49Na0.49Li0.02)(Ta0.2Nb0.8)O3–0.05BaZrO3with 2 wt% MnO2 (KNNLT-BZM) lead-free epitaxial ferroelectric film on LaNiO3 (LNO)-coated SrTiO3 (STO) (001)substrate. The x-ray diffraction results show that a mixed orthorhombic (O) and tetragonal (T) phase is obtained in KNNLT-BZM film. The MnO2 doping can effectively suppress its leakage current, which greatly improves the electrical performance featured by a lower leakage value of 8 × 10–11A cm−2 , a twice remnant polarization of 44.7 μC cm−2 , and frequency-dependent ferroelectricity between 50 Hz and 10 kHz. Strikingly, the KNNLT-BZM film maintained ferroelectric nature up to 200 °C, and exhibit a phase transition from O + T mixed phase to T phase (TMix-T) at 300 °C with a high Curie temperature above 440 °C. These results suggest great application potentials of KNN-based films in lead-free micro-electronic devices. : lead-free epitaxial film; leakage behavior; frequency-dependent ferroelectricity; thermal stability; phase transition Teng Li Song Dai Liqiang Xu Yiwen Liu Hao Zhuo Ke Wang Haifeng Wang Feng Chen PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/10.1088/2053-1591/ac6b8c Science Data Bank