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

页码：E1239 / E1241

页数：3

共 7 条

[1] CORE AND VALENCE LEVEL PHOTOEMISSION STUDIES OF IRON-OXIDE SURFACES AND OXIDATION OF IRON [J].