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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/17726

Title: Magnetic couplings in CoFe2O4/FeCo-FeO core-shell nanoparticles
Authors: SOARES, JM
CONCEICAO, OLA
MACHADO, FLA
PRAKASH, A
RADHA, S
NIGAM, AK
Keywords: FEO/FE3O4
Issue Date: 2015
Publisher: ELSEVIER SCIENCE BV
Citation: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 374,192-196
Abstract: CoFe2O4/FeCo-FeO core-shell nanoparticles with an average particle size of about 4.3 nm were prepared by reducing nanoparticles of superparamagnetic cobalt-ferrite under hydrogen and oxygen atmospheres. The low temperature magnetic hysteresis showed an interesting behavior which has only been observed in thin film multilayer systems. At low magnetic fields H (< 0.2 kOe) the behavior is dominated by the magnetic structure of the magnetically soft shell while for higher values of 11 the exchange-spring core-shell coupling plays a major role. A particle model which is coherent with the observed magnetic behavior has been also proposed. (C) 2014 Elsevier B.V. All rights reserved
URI: http://dx.doi.org/10.1016/j.jmmm.2014.08.015
http://dspace.library.iitb.ac.in/jspui/handle/100/17726
ISSN: 0304-8853
1873-4766
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