Paramagnetic to Superparamagnetic Transition in Ni(OH)2 Nanoparticles
Abstract
We report the temperature and field dependence of dc magnetization on sol-gel prepared nanoparticles of Ni(OH)2. At higher temperature the system is found to behave as a paramagnet while we find evidence for superparamagnetic blocking at low temperature. The system shows a paramagnet-superparamagnet transition and we discuss the underlying mechanism.
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