Synthesis and Magnetic studies of CoFe2O4 nanoparticles prepared by co-precipitation method. | [Proceedings Conference on Nano-Science and Technology in Pakistan • 2005]

Author(s):

1. K. Maaz: Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan

2. Arif Mumtaz: Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan

3. S. K. Hasanain: Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan

Abstract:

Synthesis of cobalt ferrite nanoparticles by co-precipitation method has been presented. The XRD and TEM confirmed the formation of single phase cobalt ferrite nanoparticles in the range 15-48nm. The size of the particles is observed to be increasing with increasing annealing temperature and time while the coercivity goes through a maximum, peaking at around 28nm. A very large coercivity (~10kOe) is observed on cooling down to 77K while typical blocking effects are observed below about 260K. The high field moment is observed to be small for smaller particles and approaches the bulk value for large particles.

Page(s): 95-98

DOI: DOI not available

Published: Journal: Proceedings Conference on Nano-Science and Technology in Pakistan, Volume: 0, Issue: 0, Year: 2005

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