Nanostructure and paramagnetic behaviour of NiZn ferrite spherical particles

被引：8

作者：

Nam, JH ^{[1
]}

Kim, WK ^{[1
]}

Park, SJ ^{[1
]}

Yeo, DH ^{[1
]}

Kim, HT ^{[1
]}

机构：

[1] Korea Inst Ceram Engn & Technol, Elect Components Mat Div, Seoul 153801, South Korea

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2004年 / 201卷 / 08期

关键词：

D O I：

10.1002/pssa.200304629

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

NiZn ferrite particles were prepared by ultrasonic spray pyrolysis with a mixed solution of aqueous metal nitrates. A nanoporous structure of the NiZn ferrite particles was observed by electron microscopy. The structure formed with nanosized primary particles of about 10 nm or less before annealing, which showed paramagnetic behaviour measured at 77 K and room temperature. The typical abnormal intraparticle growth like polyhedral primary particles was observed by annealing at 1000 degreesC with a dependency on Zn concentration. The NiZn ferrite particles showed a magnetization of over 19 emu/g and coercivity of over 550 Oe at a low temperature below 50 K due to the magnetic behaviour of the nanostructured primary particles. Mossbauer studies showed that the NiZn ferrite particles as prepared before annealing had a paramagnetic ratio of about 44%, but a normal ferrimagnetic structure after annealing at 1000 degreesC.

引用

页码：1846 / 1850

页数：5

共 15 条

[1]

BATE G, 1980, P ICF3, P509

[2] Thermal dependence of the saturation magnetisation of Mn0.6Fe0.4Fe2O4 nanoparticles in a ferrofluid [J].

Caizer, C .

SOLID STATE COMMUNICATIONS, 2002, 124 (1-2) :53-57

[3] Continuous hydrothermal synthesis and crystallization of magnetic oxide nanoparticles [J].

Cote, LJ ;

Teja, AS ;

Wilkinson, AP ;

Zhang, ZJ .

JOURNAL OF MATERIALS RESEARCH, 2002, 17 (09) :2410-2416

[4] MAGNETIC-PROPERTIES OF ULTRAFINE IRON PARTICLES [J].

GANGOPADHYAY, S ;

HADJIPANAYIS, GC ;

DALE, B ;

SORENSEN, CM ;

KLABUNDE, KJ ;

PAPAEFTHYMIOU, V ;

KOSTIKAS, A .

PHYSICAL REVIEW B, 1992, 45 (17) :9778-9787

[5]

Grandjean F., 1989, MOSSBAUER SPECTROSCO, V3

[6] Synthesis and characterization of CoFe2O4 magnetic nanoparticles prepared by temperature-controlled coprecipitation method [J].

Kim, YI ;

Kim, D ;

Lee, CS .

PHYSICA B-CONDENSED MATTER, 2003, 337 (1-4) :42-51

[7] MOSSBAUER-SPECTROSCOPY OF FE3O4 ULTRAFINE PARTICLES [J].

LEHLOOH, AF ;

MAHMOOD, SH .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 151 (1-2) :163-166

[8] Magnetic properties of gamma-Fe2O3 nanoparticles obtained by vaporization condensation in a solar furnace [J].

Martinez, B ;

Roig, A ;

Obradors, X ;

Molins, E ;

Rouanet, A ;

Monty, C .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (05) :2580-2586

[9] Towards a revised base wind speed map for the United Kingdom [J].

Miller, CA ;

Cook, NJ ;

Barnard, RH .

WIND AND STRUCTURES, 2001, 4 (03) :197-212

[10] Characterization of ferrites synthesized by mechanical alloying and soft chemistry [J].

Millot, N ;

Colin, SB ;

Perriat, P ;

Le Caër, G ;

Welter, R ;

Malaman, B .

NANOSTRUCTURED MATERIALS, 1999, 12 (5-8) :641-644

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