Faculty of Materials, Optoelectronics and Physics, Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education, Xiangtan University, Xiangtan, Hunan, 411105, China.
Nanoscale. 2011 Aug;3(8):3152-8. doi: 10.1039/c1nr10288e. Epub 2011 Jun 3.
Multiferroic CoFe(2)O(4)-Pb(Zr(0.52)Ti(0.48))O(3) core-shell nanofibers have been synthesized by coaxial electrospinning in combination with a sol-gel process. The core-shell configuration of nanofibers has been verified by scanning electron microscopy and transmission electron microscopy, and the spinel structure of CoFe(2)O(4) and perovskite structure of Pb(Zr(0.52)Ti(0.48))O(3) have been confirmed by X-ray diffraction and selected area electron diffraction. The multiferroic properties of core-shell nanofibers have been demonstrated by magnetic hysteresis and piezoresponse force microscopy, and their magnetoelectric coupling has been confirmed by evolution of piezoresponse under an external magnetic field, showing magnetically induced ferroelectric domain switching and changes in switching characteristics. The lateral magnetoelectric coefficient is estimated to be 2.95 × 10(4) mV/cmOe, two orders of magnitude higher than multiferroic thin films of similar composition.
多铁性 CoFe2O4-Pb(Zr0.52Ti0.48)O3 核壳纳米纤维通过同轴静电纺丝与溶胶-凝胶工艺相结合合成。纳米纤维的核壳结构通过扫描电子显微镜和透射电子显微镜得到了验证，CoFe2O4 的尖晶石结构和 Pb(Zr0.52Ti0.48)O3 的钙钛矿结构通过 X 射线衍射和选区电子衍射得到了确认。磁滞回线和压电力显微镜证明了核壳纳米纤维的多铁性能，外磁场下压电力的演变证实了其磁电耦合，表现出磁场诱导铁电畴的翻转和翻转特性的变化。横向磁电系数估计为 2.95×104 mV/cmOe，比类似成分的多铁性薄膜高出两个数量级。
