Paramagnetic to Superparamagnetic Transition in Ni(OH)_2 Nanoparticles
S. D. Tiwari (1), K. P. Rajeev (2) ((1) School of Physics and, Materials Science, Thapar University, India,(2) Department of Physics, Indian, Institute of Technology Kanpur, India)
TL;DR
This study investigates the magnetic phase transition in Ni(OH)_2 nanoparticles, revealing a temperature-dependent shift from paramagnetic to superparamagnetic behavior and discussing the underlying mechanisms involved.
Contribution
It provides new insights into the temperature and field dependence of magnetic states in Ni(OH)_2 nanoparticles, highlighting the paramagnet-superparamagnet transition.
Findings
Paramagnetic behavior at high temperature
Superparamagnetic blocking at low temperature
Evidence of a paramagnet-superparamagnet transition
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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Taxonomy
TopicsMagnetism in coordination complexes · Advanced Thermodynamics and Statistical Mechanics · Catalysis and Oxidation Reactions