Magnetic properties of iron-oxide and (iron, cobalt)-oxide nanoparticles synthesized in polystyrene resin matrix

被引：8
|
作者：
Naik, R. [1 ]
Kroll, E.
Rodak, D.
Tsoi, G. M.
McCullen, E.
Wenger, L. E.
Suryanarayanan, R.
Naik, V. M.
Vaishnava, P. P.
Tao, Qu
Boolchand, P.
机构：
[1] Wayne State Univ, Dept Phys, Detroit, MI 48201 USA
[2] Univ Paris 11, LPCES, Orsay, France
[3] Univ Michigan, Dept Nat Sci, Dearborn, MI 48128 USA
[4] Kettering Univ, Flint, MI 48504 USA
[5] Univ Cincinnati, Dept ECECS, Cincinnati, OH 45221 USA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷
关键词：
magnetic iron oxide nanoparticles; superparamagnetism; Fe-57 Mossbauer spectroscopy; blocking temperature;
D O I：
10.1016/j.jmmm.2003.12.300
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A sulfonated polystyrene resin matrix was ion exchanged with aqueous solutions of (1) FeCl2, (2) FeCl3, (3) 2FeCl(2):FeCl3, (4) 9FeCl(2):CoCl2, and (5) 4FeCl(2):CoCl2 to prepare magnetic nanoparticles of varying size. The samples were characterized by X-ray diffraction (XRD), Fe-57 Mossbauer spectroscopy, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM), and identify two major phases: gamma-Fe2O3, CoFe2O4, and perhaps a minor Fe3O4 phase. SQUID magnetometry measurements indicate superparamagnetic particles with blocking temperatures (T-B) ranging from 20 K to room temperature. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码：E1239 / E1241
页数：3
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