Effect of interface recombination on magnetoelectric coupling in CoFe2O4-BaTiO3 composites
The (1-x)CoFe2O4+xBaTiO3 (x=0.5) magnetoelectric(ME) nano-powders were prepared by molten salt synthesis method and the corresponding ceramics were sintered.The morphology and structure of as-prepared powders and ceramics were characterized and studied systematically by using XRD,SEM and EDX.In particles,the two phases,CoFe2O4 and BaTiO3,are symbiotic with nano-scale coordinate lattice.A considerable ME coefficient(αE) of about 15.96 mV/A is observed in the x=0.5 ME ceramic,which is attributed to the better interface sintered by using those nano-particles with the two phases and a correct poling strategy on the sample.But the interface between the phases has gone through a separating and recombinating during their sintering process.A two-time sintering process was also performed on those ceramics while the αE of the x=0.5 two-time sintered ceramic drops to 67.7 μV/A,which could be explained by the split of the interface during the recombination in the ceramics preparation.
magnetoelectric ceramics molten salt magnetic properties interface
NIE Jun-wu XU Guo-yue QI Xian-jin
College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China
国际会议
2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)
长沙
英文
1593-1598
2009-11-22（万方平台首次上网日期，不代表论文的发表时间）