Abstract
Magnetic behaviors of the magnetic semiconductor Mn-doped AgGaSe2 with no secondary phases are reported. Magnetization measurements show that Mn-doped AgGaSe2 exhibits a superparamagnetic behavior while undoped AgGaSe2 shows diamagnetism. Significant anomalies are also seen in the temperature dependent ac susceptibility and specific heat at 190 and 275K. These results indicate that the substitution of Mn induces magnetism in AgGaSe2. The origin of the magnetic behaviors is discussed on the basis of the combined results of susceptibility, specific heat, and photoluminescence.
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