This article is cited in 12 papers

Magnetism

Magnetic properties and local configurations of $^{57}$Fe atoms in CoFe$_2$O$_4$ powders and CoFe$_2$O$_4$/PVA nanocomposites

Yu. A. Fedotova^a, V. G. Baev^a, A. I. Lesnikovich^b, I. A. Milevich^b, S. A. Vorobyova<sup>b

a</sup> National Scientific and Educational Centre of Particle and High Energy Physics, Belarusian State University, Minsk, 220040, Belarus
^b Research Institute for Physical Chemical Problems of the Belarusian State University, Minsk

Abstract: The composition and magnetic properties of the powders extracted from CoFe$_2$O$_4$ aqueous suspensions and the CoFe$_2$O$_4$/PVA (PVA is polyvinyl alcohol) nanocomposites with a cobalt ferrite content of 10–30 wt% have been investigated using Mössbauer spectroscopy, transmission electron microscopy, and vibration magnetometry. The cationic formulas of the cobalt ferrites synthesized have been determined. The differences between samples synthesized at temperatures of 72.5 and 82.5$^\circ$C have been revealed. The specific features of the observed changes in the agglomeration of CoFe$_2$O$_4$ particles after introducing into the PVA matrix have been studied. It has been shown that the iron ion distribution determined by Mössbauer spectroscopy in octahedral and tetrahedral lattice sites correlates with vibration magnetometry data.

Received: 15.07.2010

 English version: Physics of the Solid State, 2011, 53:4, 694–700

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