Size and shape control of monodisperse FePt nanoparticles

被引：146

作者：

Nandwana, Vikas ^{[1
]}

Elkins, Kevin E. ^{[1
]}

Poudyal, Narayan ^{[1
]}

Chaubey, Girija S. ^{[1
]}

Yano, Kazuaki ^{[1
]}

Liu, J. Ping ^{[1
]}

机构：

[1] Univ Texas, Dept Phys, Arlington, TX 76019 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 11期

关键词：

D O I：

10.1021/jp068330e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Morphological control of FePt nanoparticles has been systematically studied. By varying synthetic parameters including precursors, solvents, amount of surfactants, and heating rate of the solution, the particle size from 2 to 9 nm can be tuned with 1 nm accuracy. While most particles are spherical in shape, cubic particles can be obtained when particles are greater than 7 nm. Rod-shape nanoparticles have also been obtained. The as-synthesized nanoparticles are found to be superparamagnetic at room temperature and their blocking temperature is size dependent that increases with particle size. After annealing in a reducing atmosphere, the nanoparticles form hard magnetic films with ordered fct structure and high coercivity up to 2.7 T.

引用

页码：4185 / 4189

页数：5

共 40 条

[1] One-step synthesis of FePt nanoparticles with tunable size [J].