A magnetite colloid system studied by Mössbauer spectroscopy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Magnetite loaded polyvinyl alcohol and polystyrol hydrogels were investigated by the help of 57Fe Mössbauer spectroscopy, XRD and transmission electron microscopy. Chemically cross-linked polyvinyl alcohol hydrogels filled with magnetite particles were prepared from magnetite sol obtained from FeCl2 and FeCl3 in aqueous solution. At near room temperature, the Mössbauer spectrum has hyperfine fields smaller than those characteristic of bulk magnetite. The temperature dependent collapse of the hyperfine splitting can be associated with paramagnetism rather than superparamagnetism. This indicates that a special magnetic interaction occurs between the small particles. This may be interpreted in the terms of dynamic magnetic phenomenon in fine particle magnetite incorporated into swollen elastic polymer network by supposing magnetic ordering of clusters (after Boquet et al.) created by high concentration of defects when the hyperfine field distribution is mainly influenced by the slow relaxation of the magnetic moments of the clusters. Nevertheless, the effect of monodispersity of the colloid system may also contribute to the unusual relaxation shape of the Mössbauer spectra.

Original languageEnglish
Title of host publicationINDUSTRIAL APPLICATIONS OF THE MOSSBAUER EFFECT
Subtitle of host publicationInternational Symposium on the Industrial Applications of the Mossbauer Effect
Pages223-227
Number of pages5
DOIs
Publication statusPublished - Apr 26 2005
EventInternational Conference on the Industrial Applications of the Mossbauer Effect - Madrid, Spain
Duration: Oct 4 2004Oct 8 2004

Publication series

NameAIP Conference Proceedings
Volume765
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference on the Industrial Applications of the Mossbauer Effect
CountrySpain
CityMadrid
Period10/4/0410/8/04

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'A magnetite colloid system studied by Mössbauer spectroscopy'. Together they form a unique fingerprint.

  • Cite this

    Kuzmann, E., Homonnay, Z., Németh, Z., Vértes, A., Garg, V. K., & Zrínyi, M. (2005). A magnetite colloid system studied by Mössbauer spectroscopy. In INDUSTRIAL APPLICATIONS OF THE MOSSBAUER EFFECT: International Symposium on the Industrial Applications of the Mossbauer Effect (pp. 223-227). (AIP Conference Proceedings; Vol. 765). https://doi.org/10.1063/1.1923659