Superparamagnetic Particle Size Limit of Mn-Zn Ferrite Nanoparticles Synthesised Through Aqueous Method

Journal Article · Mon May 15 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2207067· OSTI ID:20798650

Joseyphus, R Justin ^[1]; Narayanasamy, A ^[2]; Jeyadevan, B; Shinoda, K; Tohji, K ^[1]

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1. Graduate School of Environmental Studies, Tohoku University, AramakiAza Aoba-ku, Sendai 980-8579 (Japan)
2. Materials Science Centre, Dept. of Nuclear Physics, University of Madras, Guindy Campus, Chennai-25 (India)

Mn0.67Zn0.33Fe2O4 nanoparticles with size ranging from 20 to 80 nm have been synthesized using the modified oxidation method. The Curie temperatures for all the samples are found to be within 630 {+-} 5 K suggesting that there is no size-dependent cation distribution. Moessbauer studies on the synthesized nanoparticles suggest that the critical particle size limit for superparamagnetism to be about 25 nm at 293 K.

• OSTI ID: 20798650
• Journal Information: AIP Conference Proceedings, Vol. 833, Issue 1; Conference: 3. international workshop on water dynamics, Sendai (Japan), 16-17 Nov 2005; Other Information: DOI: 10.1063/1.2207067; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CATIONS
CURIE POINT
DISTRIBUTION
FERRITES
MANGANESE COMPOUNDS
MOESSBAUER EFFECT
NANOSTRUCTURES
OXIDATION
PARTICLE SIZE
PARTICLES
SUPERPARAMAGNETISM
ZINC COMPOUNDS