Aqueous synthesis of non-superparamagnetic MnFe2O4 nanoparticles and their magnetic properties

N. Sivakumar, A. Narayanasamy, R. Justin Joseyphus, B. Jeyadevan, K. Tohji

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

Abstract

Nanocrystalline MnFe2O4 particles with average particle diameters 50 nm and less were synthesized by using the oxidation method. The superparamagnetic behavior, which is influenced by the particle size, was controlled by varying the concentration of the oxidant. The Mössbauer spectrum showed only sextets corresponding to the A- and B-sites of the ferrite, when the particle size is larger than 50 nm. However, the appearance of superparamagnetic doublet was recorded for the manganese ferrite particles synthesized using higher concentration of oxidant. The saturation magnetization of the particles larger than 50 nm was almost equal to their bulk counter part.

Original languageEnglish
Title of host publicationWATER DYANMICS
Subtitle of host publication4th International Workshop on Water Dynamics
Pages147-150
Number of pages4
DOIs
Publication statusPublished - 2007 May 11
Event4th International Workshop on Water Dynamics - Sendai, Japan
Duration: 2006 Nov 72006 Nov 8

Publication series

NameAIP Conference Proceedings
Volume898
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other4th International Workshop on Water Dynamics
CountryJapan
CitySendai
Period06/11/706/11/8

Keywords

  • Manganese zinc ferrite
  • Nanoparticles
  • Oxidation method
  • Superparamagnetic

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Sivakumar, N., Narayanasamy, A., Joseyphus, R. J., Jeyadevan, B., & Tohji, K. (2007). Aqueous synthesis of non-superparamagnetic MnFe2O4 nanoparticles and their magnetic properties. In WATER DYANMICS: 4th International Workshop on Water Dynamics (pp. 147-150). (AIP Conference Proceedings; Vol. 898). https://doi.org/10.1063/1.2721267