Multiferroic and fatigue behavior of silicon-based bismuth ferrite sandwiched structure

作者：Wu Jiagang^*; Wang John; Xiao Dingquan; Zhu Jianguo

来源：Journal of Materials Chemistry, 2011, 21(20): 7308-7313.

DOI：10.1039/c0jm04026f

Sandwich structured (Bi0.92La0.08)(Fe0.87Zn0.13)O-3/(Bi0.92La0.08)(Fe0.93Zn0.07)O-3/(Bi0.92La0.08) (Fe0.87Zn0.13)O-3 thin films were prepared on Pt/TiO2/SiO2/Si(100) substrates by radio frequency sputtering. High (110) orientation is induced in these sandwiched structures due to the introduction of the bottom (Bi0.92La0.08)(Fe0.87Zn0.13)O-3 layer with a (110) orientation. The space-charge-limited current mechanism is identified to dominate the leakage behavior of these sandwiched structures, and the lowest leakage current density is well established in such a sandwiched structure with a thickness ratio of 1 : 1 : 1 owing to its denser microstructure. All sandwiched structures demonstrate good fatigue behavior at a switching cycle of similar to 2.96 x 10(9) and similar saturated M-H loops with 2M similar to 15.5 emu cm(-3) due to the interface coupling among these constituent layers. The sandwiched structure with a thickness ratio of 1 : 1 : 1 possesses a better P-E loop with a high remanent polarization of 2P(r) similar to 142.6 mu C cm(-2

• 出版日期2011
• 单位四川大学