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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
Magnetic properties of CoFe
1.9
RE
0.1
O
4
nanoparticles (RE=La, Ce, Nd, Sm, Eu, Gd, Tb, Ho) prepared in polyol
Journal of Magnetism and Magnetic Materials, Volume 320, No. 23, Year 2008
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Description
Highly crystalline CoFe1.9RE0.1O4 ferrite nanoparticles, where RE=La, Ce, Nd, Sm, Eu, Gd, Tb, and Ho, have been synthesized by forced hydrolysis in polyol. X-ray diffraction (XRD), transmission electron microscopy (TEM), electron energy-loss spectroscopy (EELS), 57Fe Mössbauer spectrometry, Co K-edge X-ray absorption spectroscopy and magnetic measurements using a SQUID magnetometer were employed to investigate the effect of the substitution RE3+ ions for Fe3+ ones on the structure, the microstructure, the chemical homogeneity, and the magnetic properties of the cobalt ferrite system. All the produced particles are superparamagnetic at room temperature. Nevertheless, the substitution causes reduction of the blocking temperature which is mainly ascribed to partial cation exchange among the spinel-like sublattices of CoFe2O4 induced by the insertion of the relatively large RE3+ ions. The low-temperature saturation magnetization and coercivity appear to be greatly affected by the nature of RE3+ ions-maxima values were found for Gd3+ and Eu3+, respectively. © 2008 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Tahar, Lotfi Ben
Tunisia, Tunis
University of Carthage
Artus, M.
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
Ammar-Merah, Souad
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
Smiri, Leila Samia
Tunisia, Tunis
University of Carthage
Herbst, Fréd́eric
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
Vaulay, M. J.
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
Richard, V.
France, Villetaneuse
Laboratoire Des Sciences Des Procédés et Des Matériaux
Grenèche, J. M.
France, Le Mans
Le Mans Université
Villain, F.
France, Paris
Sorbonne Université
Fiévet, F.
France, Paris
Interfaces Traitements Organisation et Dynamique Des Systèmes – Itodys
Statistics
Citations: 180
Authors: 10
Affiliations: 5
Identifiers
Doi:
10.1016/j.jmmm.2008.06.031
ISSN:
03048853
Research Areas
Infectious Diseases
Study Approach
Qualitative