摘要
The tunneling structure of ZnFe3-xO4 ferrite was confirmed by high resolation electron microscopy （HREM）, non-Ohmic Ⅰ-Ⅴ curve and kinetics for α-Fe2O3 isothermal phase transformation. The Zn0.41 Fe2.59O4/ α-Fe2O3 two-phase polycrystalline has a huge tunneliug magnetorsistance （ TMR ） mainly caused by the tummeliug structure. The Zn0.41Fe2.59O4 grains are separated by insulatiug α-Fe2O3 thin layer boundaries. The pattern of nanostructure uns verified by HREM.
The tunneling structure of ZnFe3-xO4 ferrite was confirmed by high resolation electron microscopy （HREM）, non-Ohmic Ⅰ-Ⅴ curve and kinetics for α-Fe2O3 isothermal phase transformation. The Zn0.41 Fe2.59O4/ α-Fe2O3 two-phase polycrystalline has a huge tunneliug magnetorsistance （ TMR ） mainly caused by the tummeliug structure. The Zn0.41Fe2.59O4 grains are separated by insulatiug α-Fe2O3 thin layer boundaries. The pattern of nanostructure uns verified by HREM.
基金
Funded by the National Natural Science Foundation of China(No.1999064508)and Research Award Programin Jiangsu HigherEducation Institute (No.03KJB430068)
