Magnetic properties of a series of ferrite nanoparticles synthesized in reverse micelles

被引：97
|
作者：
Seip, CT [1 ]
Carpenter, EE
O'Connor, CJ
John, VT
Li, SC
机构：
[1] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA
[2] Tulane Univ, Dept Chem Engn, New Orleans, LA 70118 USA
来源：
IEEE TRANSACTIONS ON MAGNETICS | 1998年 / 34卷 / 04期
关键词：
ferrites; nanoparticles; reverse micelles; superparamagnetism;
D O I：
10.1109/20.706388
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Nanoscale particles of the general formula MFe2O4 (M=Co, Mn, Fe) were synthesized in reverse micelles of twin-tailed anionic bis(2-ethylhexyl) sodium sulfosuccinate (AOT) in isooctane. The size of the particles was controlled by adjusting the AOT/water molar ratio. Particle sizes were confirmed using XRD and uniformity was determined by SEM. Magnetic measurements, carried out using a SQUID Susceptometer, indicated superparamagnetic behavior. FC and ZFC demagnetization experiments indicate blocking temperatures of 46 K, 30 K, and 7 K for for MFe2O4 M=Co, Mn, Fe respectively. Below blocking temperatures, the nanoparticles demonstrate hysteresis with coercivities of H-c=6000G, 3800G, and 500G for the Co, Mn, and Fe ferrites.
引用
收藏
页码：1111 / 1113
页数：3
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