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以溶胶凝胶制备的Ni_(0.4)Zn_(0.5)Cu_(0.1)Fe_(12)O_(14)纳米颗粒为软磁相和BaFe_(12)_(19)为硬磁相作为原料,以摩尔比从1:0.7到1:1.4,通过热处理后得到BaFe_(12)_(19)/Ni_(0.4)Zn_(0.5)Cu_(0.1)Fe_(12)O_(14)的纳米颗粒,经XRD炭征后,得到退火后的纳米颗粒呈现高结晶度颗粒直径大概在35 nm左右。振动样品磁强计表明摩尔比为1:1的BaFe_(12)_(19)/Ni_(0.4)Zn_(0.5)Cu_(0.1)Fe_(12)O_(14)纳米颗粒拥有高的矫顽力H_c=3761X79.6 A/m和剩余磁化强度M_r=55.1 A.m~2/kg。样品平滑的磁滞回线显示了热处理后充分发生交换耦合现象。以二结果能说明热处理后的BaFe_(12)_(19)和Ni_(0.4)Zn_(0.5)Cu_(0.1)Fe_(12)O_(14)能被用米制备具有最佳磁化性能的纳米复合颗粒。
The Ni_ (0.4) Zn_ (0.5) Cu_ (0.1) Fe_ (12) O_ (14) nanoparticles prepared by sol-gel method were characterized by soft magnetic phase and BaFe_ (12) __ (19) (12) _ (19) / Ni_ (0.4) Zn_ (0.5) Cu_ (0.1) Fe_ (12) O_ (14) nanoparticles were obtained after heat treatment from 1: 0.7 to 1: 1.4. After the levy, the annealed nanoparticles show high crystallinity and the diameter of the particles is about 35 nm. The vibrating sample magnetometer shows that the BaFe_ (12) _ (19) / Ni_ (0.4) Zn_ (0.5) Cu_ (0.1) Fe_ (12) O_ (14) nanoparticles with a molar ratio of 1: 1 possess high coercivity H_c = 3761X79.6 A / m and residual magnetization M_r = 55.1 Am ~ 2 / kg. The smoothed hysteresis loop of the sample shows the full exchange coupling phenomenon after heat treatment. The results show that the heat treated BaFe_ (12) _ (19) and Ni_ (0.4) Zn_ (0.5) Cu_ (0.1) Fe_ (12) O_ (14) can be used to prepare nanocomposites with the best magnetization Granules.