Multiferroic, Optical, and Fatigue Behavior of BiFeO3 Thin Films with a Sintering Aid of CuO

作者：Wu Jiagang^*; Wang John

来源：Electrochemical and Solid-State Letters, 2010, 13(8): G68-G70.

DOI：10.1149/1.3443221

• bismuth compounds
• copper compounds
• dielectric polarisation
• energy gap
• fatigue
• ferroelectric Curie temperature
• ferroelectric thin films
• multiferroics
• sintering
• sputter deposition
• texture

The BiFeO3 (BFO) thin film was doped with CuO (1 mol %), leading to the (100) orientation when deposited on SrRuO3/LaAlO3(100) substrate by off-axis radio-frequency magnetic sputtering. The CuO-doped BFO thin film retains a high Curie temperature (similar to 820 degrees C) and possesses a direct bandgap (2.75 eV). A giant remnant polarization of 2P(r) similar to 184.7 mu C/cm(2) and good fatigue endurance are also shown for the CuO-doped BFO thin film. Its frequency dependence of fatigue endurance was correlated with the impedance analysis, confirming the involvement of oxygen vacancies.

• 出版日期2010