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IJPAP Vol.45(10) [October 2007] >


Title: Mössbauer spectroscopy: An essential tool for nanoparticle magnetism in Co₀․₂Zn₀․₈Fe₂O₄ ferrite
Authors: Bhowmik, R N
Ranganathan, R
Keywords: Mössbauer spectroscopy
Nanoparticle magnetism
Co₀․₂Zn₀․₈Fe₂O₄ ferrite
Issue Date: Oct-2007
Publisher: CSIR
IPC CodeG01J3/28, H01F41/30
Abstract: Magnetism in Co₀․₂Zn₀․₈Fe₂O₄ nanoparticles, prepared by mechanical activated process and chemical (co-precipitation) process has been reported. Experimental data showed that magnetic behaviour in mechanical activated nanoparticles (MANP) is drastically different in comparison with the nanoparticles (CPNP) prepared by chemical route. For example, MANP exhibited enhancement in both magnetization and ferrimagnetic order, whereas CPNP shows the reduction in both magnetization and magnetic order. The magnetic evolution during thermal activated grain growth process is also different for samples with smaller particle size, whereas magnetic behaviour for larger particle size is similar for both nano particles and approaching to the properties of bulk system. We have understood the co-existence of various competitive effects during grain growth process employing Mössbauer spectroscopy, dc magnetization and ac susceptibility measurements.
Page(s): 810-815
ISSN: 0019-5596
Source:IJPAP Vol.45(10) [October 2007]

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