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Magnetic characteristics of nickel doped pentacene film

This study demonstrates that magnetic domain distribution is similar to the surface morphology of pentacene film doped with nickel atom through atomic force microscopy and magnetic force microscopy techniques. Remanent magnetization was observed at room temperature (RT) when the hysteresis curve was recorded under the field region between –3 and 3 kOe. Coercivity ( H c ) is 73 Oe at RT. Most importantly, Curie temperature exceeded RT, as proven by temperature-dependent magnetization measured at zero-field-cooling and field-cooling processes.