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采用交流电沉积方法于不同频率在氧化铝模板中合成了线间距50 nm、直径22 nm的Fe-Co合金纳米线阵列,研究了沉积频率对阵列成分、晶体结构以及磁性能的影响.研究发现:Fe-Co纳米线阵列的最佳沉积频率范围为5~350 Hz.在此范围内合成的阵列,其晶体结构对沉积频率的依赖并不明显,但成分与磁性能却会受到沉积频率的影响.阵列磁性能随频率的变化趋势可以用纳米线饱和磁化强度与线间静磁耦合作用的改变来定性解释.氢气退火后,所有阵列均具有良好的磁性能.它们的矫顽力和矩形度分别高于3.512kOe和0.939.其中,50 Hz沉积的阵列磁性能相对最好.热磁分析表明:其居里温度约为630℃.
The effects of deposition frequency on the composition, crystal structure and magnetic properties of Fe-Co alloy nanowire arrays were investigated by AC electrodeposition at different frequencies in alumina templates. The results showed that: The optimum deposition frequency range of Fe-Co nanowire arrays is 5 ~ 350 Hz. The crystal structures of the synthesized arrays are not dependent on the deposition frequency but the composition and magnetic properties are affected by the deposition frequency The trend of the magnetic properties of the array with frequency can be qualitatively explained by the change of the saturation magnetization between the nanowires and the magnetostatic coupling between the wires.After hydrogen annealing, all the arrays have good magnetic properties.Their coercivity and squareness Which is higher than 3.512 kOe and 0.939 respectively, among them, the magnetic properties of the array deposited at 50 Hz are the best, and the thermal magnetic analysis shows that the Curie temperature is about 630 ℃.