Characterization of nanosized spinel ferrite powders synthesized by coprecipitation and autocombustion method

被引：39

作者：

Aphesteguy, Juan Carlos ^{[1
]}

Jacobo, Silvia E. ^{[1
]}

Schegoleva, N. N. ^{[2
,3
]}

Kurlyandskaya, G. V. ^{[4
]}

机构：

[1] UBA, Fac Ingn, LAFMACEL, Buenos Aires, DF, Argentina

[2] Ural State Univ, Dept Magnetism & Magnet Nanomat, Ekaterinburg 620083, Russia

[3] Inst Met Phys UD RAS, Ekaterinburg 620041, Russia

[4] Univ Basque Country, UPV EHU, Dept Elect & Elect, Leioa 48940, Spain

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 495卷 / 02期

关键词：

Nanoparticles; Soft magnetic materials; Chemical synthesis; Magnetic measurements; X-ray diffraction; MAGNETIC-PROPERTIES; NIZNCU FERRITE; NANOPARTICLES; GROWTH;

D O I：

10.1016/j.jallcom.2009.10.037

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnetic nanoparticles of magnetite (Fe3O4) and NiCuZn-doped magnetite (Ni-0 35Cu0 15Zn0 5Fe2O4) were prepared by coprecipitation and by sol-gel combustion methods accordingly. The average size, d, of magnetite nanoparticles (d = 12 nm) and the NiCuZn ferrite nanoparticles ignited at about 250 degrees C (d = 30 nm) was estimated from X-ray diffraction patterns The Mossbauer spectroscopy revealed the existence of the paramagnetic doublet in both samples For magnetite. coercive force of about 400 Oe was found at 5K. Likewise, the coercive field of the NiCuZn-doped magnetite nanoparticles decreases with Fe2+ substitution at low temperature (260 Oe). This behavior can be explained taking into account the fact that the magnetocrystalline anisotropy constant of Fe3O4 is higher than that of NiCuZn ferrite (C) 2009 Elsevier B V All rights reserved

引用

页码：509 / 512

页数：4

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