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在用二次氧化法制备的高度有序的氧化铝模板上通过交流电化学方法制备了Co纳米线阵列.研究了外加磁场及电解液pH值对纳米线生长的影响.在pH值为6.0和6.5的电解液中分别在不加磁场和沿纳米线轴向施加0.3T磁场情况下制备了hcp结构的Co纳米线阵列.实验数据表明,沉积时外加磁场和调节pH值能有效影响纳米线中hcp结构的Co晶粒的易磁化轴沿纳米线长轴方向生长.由于晶粒的磁晶各向异性和纳米线沿长度方向的宏观形状各向异性叠加,制备的Co纳米线阵列具有高垂直各向异性,高矫顽力和较高矩形比.
Co nanowire arrays were prepared by AC electrochemical method on a highly ordered alumina template prepared by the secondary oxidation method.The effects of applied magnetic field and pH value on the growth of nanowires were investigated.When the pH value was 6.0 and 6.5 Of the electrolyte in the absence of magnetic field and applied along the axial direction of the nanowire 0.3T magnetic field prepared under the condition of the hcp Co nanowire array experimental data show that the deposition of the magnetic field and adjust the pH value can effectively affect the hcp The axis of easy magnetization of the Co crystal grains of the structure grows along the long axis of the nanowire.As the magnetocrystalline anisotropy of the crystal grains and the anisotropy of the macroscopic shape anisotropy of the nanowires along the length direction, the prepared Co nanowire arrays have high vertical To the opposite sex, high coercivity and higher rectangular ratio.