Synthesis of FePt and FePtCu Nanoparticles by a Reverse Micelle Method and Studies of Magnetic Recording Media Using Them
Synthesis of FePt and FePtCu Nanoparticles by a Reverse Micelle Method and Studies of Magnetic Recording Media Using Them
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反胶束法合成 FePt 和 FePtCu 纳米粒子及其磁记录介质的研究
DOI：
10.3379/tmjpn2001.4.85
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Gen
中科院分区：
文献类型：
--
作者：
Y. Hattori;K. Waki;K. Ogawa;Gen
纳米颗粒FePt在加热下高度稳定，是未来超高密度磁记录介质中非常有前途的磁性材料。 FePt 和 FePtCu 纳米粒子通过反胶束法（H2O/双（2-乙基己基）磺基琥珀酸钠（AOT）/癸烷）合成。该方法获得的FePt和FePtCu纳米颗粒表现出单分散性和元素组成均一（变异系数均小于10%），并且这些颗粒的平均直径能够在3~9 nm之间任意控制。此外，FePtCu纳米颗粒在Ar+H2(5％)气体中的退火将通过氧化态从fcc改性到fct的温度降低到350℃-375℃的范围。涂覆在玻璃基板上的纳米颗粒 FePt 和 FePtCu 介质的表面粗糙度 (Ra) 小于 1 nm，并表现出磁记录能力。
Nanoparticulate FePt, which is highly stable under heating, is a very promising magnetic material for future super-highdensity magnetic recording media. The FePt and FePtCu nanoparticles were synthesized by a reverse micelle method (H2O/sodium bis (2-ethylhexyl) sulfosuccinate (AOT)/decane). FePt and FePtCu nanoparticles obtained with this method exhibited monodispersity and homogeneous elemental composition (both coefficients of variation are less than 10%), and the average diameter of these particles was able to arbitrarily controlled between 3 and 9 nm. Further, annealing of the FePtCu nanoparticles in an Ar+H2 (5%) gas lowered the temperature for modification from fcc to fct by way of the oxidation state to the range of 350°C-375°C. Nanoparticulate FePt and FePtCu media coated on glass substrates had a surface roughness (Ra) of less than 1 nm and showed magnetic recording capability.