Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/60651
Type: Artigo de periódico
Title: Investigations of lanthanum doping on magnetic properties of nano cobalt ferrites
Author: Kumar, P
Sharma, SK
Knobel, M
Chand, J
Singh, M
Abstract: The magnetic properties of nano-crystallite cobalt lanthanum ferrite (CoLa(x)Fe(2-x) O(4)) with varied quantities of lanthanum (x = 0, 0.1, 0.15, 0.2, 0.25, 0.3) prepared by co-precipitation method have been studied by vibrating sample magnetometer (VSM) and LCR meter. X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed the size, structure, and morphology of the ferrite samples. The average crystallite size varied from 17.83 nm to 49.99 nm. All the samples, although, in nano range, show significant hysteresis. The saturation magnetization (M(s)) values decreased from 60.57 emu/g to 30.15 emu/g. The remanence (M(R)) fell from 10.85 emu/g to 6.39 emu/g. Doping with lanthanum La(3+) ions modulates significantly the magnetic properties of cobalt spinel ferrites without sacrificing the ferromagnetic character.
Subject: Coprecipitation
Saturation magnetisation
Permeability
Ferrite
Country: Holanda
Editor: Springer
Rights: fechado
Identifier DOI: 10.1007/s10832-011-9649-4
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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