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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
Magnetic properties of zinc ferrite nanoparticles synthesized by hydrolysis in a polyol medium
Journal of Physics Condensed Matter, Volume 18, No. 39, Article 032, Year 2006
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Description
Highly crystalline, nanometre sized ZnFe2O4 particles with different diameters, 6.6 and 14.8nm, were prepared by forced hydrolysis in a polyol medium. The DC magnetic properties exhibit a strong dependence on the particle size as a result of the unusual cation distribution. They clearly establish their superparamagnetic character at room temperature and the occurrence of ferrimagneticor ferromagnetic ordering at low temperature. The magnetization is found to increase with grain size reduction. The 57Fe Mössbauer spectra were recorded at 300 and 4.5K. There is no evidence for the presence of the Fe2+ charge state, confirming the perfect stoichiometry of the two samples. At 300K, the Mössbauer spectra consist of doublets due to the superparamagnetic behaviour whereas at 4.5K they reveal a magnetically blocked state. Mössbauer spectra at 10K in an external 6T magnetic field applied parallel to the direction of the gamma rays clearly show a close to collinear Néel-like ferrimagnetic ordering for the 6.6nm particles and a canted Yafet-Kittel-like ferrimagnetic ordering for the 14.8nm ones. © IOP Publishing Ltd.
Authors & Co-Authors
Ammar-Merah, Souad
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
France, Paris
Université Paris Cité
Jouini, Noureddine
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
France, Villetaneuse
Laboratoire Des Sciences Des Procédés et Des Matériaux
Fiévet, F.
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
Beji, Zyed
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
Tunisia, Tunis
University of Carthage
Smiri, Leila Samia
Tunisia, Tunis
University of Carthage
Moliné, Philippe
France, Nantes
Institut Des Matériaux Jean Rouxel
Danot, Michel
France, Nantes
Institut Des Matériaux Jean Rouxel
Grenèche, J. M.
France, Le Mans
Le Mans Université
Statistics
Citations: 87
Authors: 8
Affiliations: 6
Identifiers
Doi:
10.1088/0953-8984/18/39/032
ISSN:
09538984
e-ISSN:
1361648X