Fe_(0.3)Co_(0.7)纳米有序阵列的制备及磁学特性

Preparation and magnetic property of Fe_(0.3)Co_(0.7) nanowire arrays

采用交流电化学沉积法,在小孔径的阳极氧化铝模板里,成功制备了Fe0.3Co0.7纳米线有序阵列.研究了直径、热处理对这种纳米阵列的磁学特性的影响,发现随纳米线直径的增加,垂直磁各向异性线性下降,样品在不同的温度热处理后,矫顽力普遍得到很大的提高,由未热处理前的2.05 kOe提高到热处理后的2.50 kOe以上,样品在500℃热处理后获得最大的矫顽力为3.00 kOe,而剩磁比在热处理后仍然保证很高的数值(超过0.9).这种制备简单价格便宜的纳米磁记录阵列,有望发展成为新型的超高密度量子磁盘.

Fe0.3Co0.7 nanowire arrays were prepared electrodeposition into the porous anodic aluminum oxide templates. The change of magnetic property of arrays for diameter and heat treatment was investigated. It is found that vertical magnetic anisotropy would drop linearly when the diameter of the arrays increased abd annealing can improve the coercivity of nanowire arrays. Coercivity as high as 3.00 kOe was obtained in the sample annealing at 500℃. The arrays of nano magnetic record will be developed to ultra high-density recording quanta disk by its convenience.