Superparamagnetism – a size effect
International Journal of Development Research
Superparamagnetism – a size effect
Received 14th May, 2017; Received in revised form 25th June, 2017; Accepted 23rd July, 2017; Published online 30th August, 2017
Copyright ©2017, Bandana Gogoi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In many ferromagnetic materials when the size of the particle is reduced to nanodimension, super behaviour called superparamagnetism occurs. The hysteresis loop change unusually and there is no remenance and coercive field. The M-H curve passes through the origin i.e. it needs no energy to bring back the sample from magnetised form to zero magnetisation.
