Preparation of one-dimensional nanostructures BaFe ₁₂O ₁₉ and study with magnetic manipulation

BaFe ₁₂O ₁₉ nanowires were prepared into homemade AAO by the sol-gel method. The diameter of nanowires is 40-60nm, and the length is 150-200nm. The composition, pattern and magnetic performance of the nanowires were characterized by XRD, FESEM and VSM. The rapping and ordering of the BaFe ₁₂O ₁₉ nanowires was carried out by magnetic force. The results show that the preferred direction of magnetization of BaFe ₁₂O ₁₉ is along to the nanowire direction, and the nanowires alignment is along the line of force, joint alpha and omega to chain.When magnetic field is parallel with the array of BaFe ₁₂O ₁₉ nano-chain, BaFe ₁₂O ₁₉ nanowires possess high residual magnetization(M _r), specific magnetism(M _s) and maximum magnetic energy product(BH) _m, the coercivity(H _c) is increased from 3.98×10 ⁵A/m to 5.01×10 ⁵A/m, the specific magnetism S _⊥(ratio of B _r and H _c) approaches to 0.9, all of this show that BaFe ₁₂O ₁₉ nanowires are the high density vertical magnetic recording medium.