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

被引：98

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

页码：1111 / 1113

页数：3

共 7 条

[1] NANOSTRUCTURED MATERIALS SCIENTIFIC BACKGROUND AND TECHNOLOGICAL PERSPECTIVES [J].

GLEITER, H .

INTERFACES II, 1995, 189- :67-80

[2]

KLABUNDE KJ, 1994, NATO ADV SCI INST SE, V260, P1

[3] SYNTHESIS OF COPPER METALLIC CLUSTERS USING REVERSE MICELLES AS MICROREACTORS [J].

LISIECKI, I ;

PILENI, MP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (10) :3887-3896

[4] PREPARATION OF NANOPARTICLES OF SILVER-HALIDES, SUPERCONDUCTORS AND MAGNETIC-MATERIALS USING WATER-IN-OIL MICROEMULSIONS AS NANO-REACTORS [J].

PILLAI, V ;

KUMAR, P ;

HOU, MJ ;

AYYUB, P ;

SHAH, DO .

ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1995, 55 :241-269

[5] Synthesis of high-coercivity cobalt ferrite particles using water-in-oil microemulsions [J].

Pillai, V ;

Shah, DO .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1996, 163 (1-2) :243-248

[6] STRUCTURE AND MAGNETIC-PROPERTIES OF NANOPARTICLES OF BARIUM FERRITE SYNTHESIZED USING MICROEMULSION PROCESSING [J].

PILLAI, V ;

KUMAR, P ;

MULTANI, MS ;

SHAH, DO .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1993, 80 (01) :69-75

[7] SYNTHESIS AND CHARACTERIZATION OF MAGNETIC NANOPARTICLES IN SPONTANEOUSLY GENERATED VESICLES [J].

YAACOB, II ;

NUNES, AC ;

BOSE, A ;

SHAH, DO .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1994, 168 (02) :289-301

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