The room temperature magnetization vs field plot of sample “A.” The inset shows the plot of the FM fraction.
The magnetization vs temperature curves of sample A recorded at during different warming (W1, W4)/cooling (C1, C4,) cycles in vacuum.
The plots, recorded at RT, for the three samples, namely, A, vacuum annealed “B,” and air annealed sample “C.” The inset shows the plot of sample B exhibiting full saturation at .
Normalized XRD plots of the ZnO:Co (5%) samples A–C. The inset shows an enlarged view of the normalized XRD plots of the ZnO:Co (5%) samples A–C in a short range of values, from 33.6° to 35.2°.
The vs data recorded during warming in a field of , for sample C. The inset (a) shows isothermal plot at , clearly showing the nonlinearity and (b) shows the plot at , exhibiting fully paramagnetic behavior.
The vs data of sample “D” recorded during warming in a field of and a vacuum of . The inset shows isothermal plot at , exhibiting fully paramagnetic behavior.
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