Abstract
The magnetic properties of Ni-doped ZnO nanoparticles are investigated using a numerical model based on simultaneous solution of the localized partition function and the master equation of particle moment dynamics. In this model, field-cooled and zero field-cooled (FC/ZFC) magnetization and the hysteresis loop are calculated. To provide an accurate model that matches the experimental results, the effect of factors such as nanoparticle distribution and randomly distributed easy axis are considered. The electronic and structural properties of Zn1−x Ni x O (x = 0.028, 0.062, and 0.125) are investigated using first-principle calculations within the framework of density function theory. The results of both models show that the Ni-doped ZnO nanoparticles behave feromagnetically at extremely low temperatures.
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