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EPR spectrum of the Ni, doped MgO crystals in their as-grown state.
The variation in coercive field with temperature for the Ni-doped MgO crystal containing Ni clusters due to annealing treatment at . The inset shows the curves for this sample at 5 and .
vs curve for the ferromagnetic fraction of the total magnetization for the Ni-doped MgO epitaxial thin film at . Inset shows the hysteresis loop between .
curve for the Co-doped MgO crystal after irradiation by heavy energetic ions. The top left inset is the data at reminiscent of paramagnetic behavior. The bottom right inset shows the ferromagnetic hysteresis loops for at 300 and , respectively.
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