Size-dependent magnetism of EuS nanoparticles

被引：54
|
作者：
Regulacio, Michelle D. [1 ]
Kar, Srotoswini [1 ]
Zuniga, Edward [1 ]
Wang, Guangbin [1 ]
Dollahon, Norman R. [1 ]
Yee, Gordon T. [1 ]
Stoll, Sarah L. [1 ]
机构：
[1] Georgetown Univ, Dept Chem, Washington, DC 20057 USA
来源：
CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 10期
关键词：
D O I：
10.1021/cm703463s
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：
EuS nanoparticles were synthesized by solution-phase thermolysis of the diethylammonium salt of the anionic europium dithiocarbamate complex, [Eu(S2CNEt2)(4)](-). Oleylamine and triphenylphosphine were used as surfactants to prevent nanoparticle agglomeration and stabilize particle growth. By varying the synthetic parameters such as reaction temperature, heating time, and the [surfactant]: [precursor] ratio, nanoparticles of different sizes were obtained. The size-dependent magnetic properties of these nanoparticles were studied, and it was observed that a decrease in the ferromagnetic ordering temperature occurs with decreasing particle size.
引用
收藏
页码：3368 / 3376
页数：9
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