Reduced Leakage Current and Ferroelectric Properties in Nd and Mn Codoped BiFeO3 Thin Films
Reduced Leakage Current and Ferroelectric Properties in Nd and Mn Codoped BiFeO3 Thin Films
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DOI：
10.1143/apex.1.051601
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发表时间：
2008-04
影响因子：
2.3
通讯作者：
T. Kawae;H. Tsuda;A. Morimoto
中科院分区：
文献类型：
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作者：
T. Kawae;H. Tsuda;A. Morimoto
采用脉冲激光沉积法在Pt/SrTiO 3（100）衬底上制备了BiFeO 3（BFO）、Nd掺杂（BNF）、Mn掺杂（BFM）和（Nd，Mn）共掺杂（BNFM）多晶薄膜。X射线衍射分析和原子力显微镜观察表明，BNFM薄膜中杂质相得到抑制，表面形貌得到改善。在BNFM膜中，与BFO、BNF和BFM膜相比，漏电流减小，并且在室温下观察到测量频率为100 Hz的P-E滞后曲线。反射极化和矫顽场分别约为100 µC/cm 2和250 kV/cm。
Polycrystalline BiFeO3 (BFO), Nd-doped (BNF), Mn-doped (BFM), and (Nd,Mn)-codoped BiFeO3 (BNFM) thin films were fabricated on Pt/SrTiO3(100) substrate by pulsed laser deposition. According to the X-ray diffraction analysis and atomic force microscope observation, suppression of impurity phases and improvement of surface morphology were realized in the BNFM film. In the BNFM film, the leakage current was reduced compared with BFO, BNF, and BFM films, and P–E hysteresis curves were observed with measurement frequency of 100 Hz at room temperature. The remanent polarization and coercive field were approximately 100 µC/cm2 and 250 kV/cm, respectively.