CoPt3磁性纳米颗粒的制备及其磁性能的优化

Preparation of CoPt_3 nanoparticles and improvements of their magnetic property

采用湿化学还原法制备了CoPt3磁性纳米颗粒,并研究了第三组元Ag对其磁性能的改善作用.结果表明,采用多重还原法可成功制备出fcc结构且平均粒径约2.6 nm的CoPt3磁性纳米颗粒,而Ag的加入使得CoPt3磁性纳米颗粒的矫顽力由78.4kA/m提高到240 kA/m.

CoPt3 nanopartieles were synthesized by a wet-chemical-reduction process, and the influence of Ag on their magnetic property was investigated. Structure studies show that the as-synthesized nanopartieles adopt a face-centeredcubic （fee） crystalline structure with an average particles size of 2. 6 nm. SQUID studies reveal that the eoereivity value of the particles increases from 78.4 kA/m to 240 kA/m due to the addition of Ag.