Monodisperse face-centred tetragonal FePt nanoparticles with giant coercivity
Monodisperse face-centred tetragonal FePt nanoparticles with giant coercivity
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DOI：
10.1088/0022-3727/38/14/003
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发表时间：
2005-07-21
影响因子：
3.4
通讯作者：
Liu, JP
中科院分区：
文献类型：
--
作者：
Elkins, K;Li, D;Liu, JP
通过一种新的热处理方法制备了具有高磁各向异性和高矫直力的单分散面心四方(FCT)FePT纳米粒子。将合成的面心立方FePT纳米颗粒与盐粉混合，在700℃下进行热处理，然后通过在水中洗涤样品来去除颗粒中的盐。在保持颗粒大小和形状不变的情况下，回收了单分散的FCT FePT颗粒。在室温下获得了高达30kOe的孤立粒子的矫顽力。
Monodisperse face-centred tetragonal (fct) FePt nanoparticles with high magnetic anisotropy and, therefore, high coercivity have been prepared via a new heat treatment route. The as-synthesized face-centred cubic FePt nanoparticles were mixed with salt powders and annealed at 700 degrees C. The salts were then removed from the particles by washing the samples in water. Monodisperse fct FePt particles were recovered with the particle size and shape being retained. Coercivity of the isolated particles up to 30 kOe at room temperature has been obtained.