Synthesis of ZnFe_2O_4 nanomagnets by Fe-ion implantation into ZnO and post-annealing  

作　　者：潘峰 郭颖 成枫锋 法涛 姚淑德 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,Peking University [2]Department of Physics,Shaanxi University of Technology

出　　处：《Chinese Physics B》2011年第12期410-415,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant No. 2010CB832904);the National Natural Science Foundation of China (Grant Nos. 10875007 and 11005005);the Research Fund of Shaanxi University of Technology,China(Grant No. SLQ0815)

摘　　要：Fe ions of dose 8×10^16 cm^-2 are implanted into a ZnO single crystal at 180 keV. Annealing at 1073 K leads to the formation of zinc ferrite （ZnFe2O4）, which is verified by synchrotron radiation X-ray diffraction （SR-XRD） and X-ray photoelectron spectroscopy （XPS）. The crystallographically oriented ZnFe2O4 is formed inside the ZnO with the orientation relationship of ZnFe2O4 （111）//ZnO （0001）. Superconducting quantum interference device （SQUID） measurements show that the as-implanted and post-annealing samples are both ferromagnetic at 5 K. The synthesized ZnFe2O4 is superparamagnetic, with a blocking temperature （TB = 25 K）, indicated by zero field cooling and field cooling （ZFC/FC） measurements.Fe ions of dose 8×10^16 cm^-2 are implanted into a ZnO single crystal at 180 keV. Annealing at 1073 K leads to the formation of zinc ferrite （ZnFe2O4）, which is verified by synchrotron radiation X-ray diffraction （SR-XRD） and X-ray photoelectron spectroscopy （XPS）. The crystallographically oriented ZnFe2O4 is formed inside the ZnO with the orientation relationship of ZnFe2O4 （111）//ZnO （0001）. Superconducting quantum interference device （SQUID） measurements show that the as-implanted and post-annealing samples are both ferromagnetic at 5 K. The synthesized ZnFe2O4 is superparamagnetic, with a blocking temperature （TB = 25 K）, indicated by zero field cooling and field cooling （ZFC/FC） measurements.

关 键 词：Fe implanted ZNO ZNFE2O4 SUPERPARAMAGNETIC 

分 类 号：O482.5[理学—固体物理]