Fe-Co-P非晶态与晶态纳米线的磁性研究

Magnetic Properties of Fe-Co-P Amorphous and Crystal Nanowire Arrays

[目的]研究双过渡金属-类金属的三元合金纳米线各成分的改变对磁学性质的影响。[方法]在氧化铝模板中用电化学沉积法制备2种体系的Fe-Co-P三元合金纳米线。[结果]用扫描电子显微镜和透射电子显微镜观测氧化铝模板和纳米线的形貌。选区电子衍射和X射线衍射结果表明,(Fe1-xCox)0.88P0.12纳米线为非晶结构,而(Fe1-xCox)0.92P0.08纳米线近似为晶态结构。用振动样品磁强计和穆斯堡尔谱仪研究了非晶态体系和晶态体系在室温下的宏观和微观磁性。随Co含量x的变化,每个体系磁参量的变化趋势基本相似,而当x相同时两体系的磁学性质又有所不同。[结论]纳米线中非晶体系的形状各向异性比晶态更明显,更适宜用于垂直磁记录中。

[Objective] The effect of the change of component of the two systems ot Fe-Co-P ternary alloy nanowire arrays on magntic chamctenshc was studied. [Method] Two systems of Fe-Co-P ternary alloy nanowire arrays were fabricated in anodic aluminium oxide （AAO） tenrplates by electrochemical deposition. [Result] Scanning electron microscope and transmission electron microscope were employed to study the morphologies of AAO templates and nanowire arrays.The selected area electron diffraction and X-ray diffraction results showed that the structure of （Fe1-xCox）0.88P0.12 nanowires was amorphons and the structure of （Fe1-xCox）0.92P0.08 nanowire was nearly crystal.The macro-magnetic and the micro-magnetic properties of （Fe1-xCox）0.88P0.12 and （Fe1-xCox）0.88P0.12 systems at room temperature （RT） were characterized using a vibrating sample magnetometer and a Mssbauer spectrometer. Magnetic parameters for the two systems varied with the increasing of the Co content were similar,while the magnetic parameters were different when the Co content was equal for the two systems. [Conclusion] The coercivity of the （Fe1-xCox）0.88P0.12 nanowires decided by the magnetocrystalline anisotropy was larger than （Fe1-xCox）0.92P0.08 nanowires and could be used to being longitudinal magnetic recording material.