Abstract
Nanosized Mn-doped ZnO particles were synthesized by a rheological phase reactionprecursor method and the thermal decomposition of the oxalate precursors was studied bythermogravimetry and differential thermal analysis in air atmosphere. X-ray analysisreveals that the Mn-doped ZnO crystallizes in a wurtzite structure. The lattice constants ofZn1−xMnxO increase slightly when Mn is doped into ZnO. TEM analysis shows that the average diameterof the nanoparticles is about 10–13 nm. In addition, magnetization measurements underfield cooling conditions reveal that the Mn-doped ZnO nanoparticles show ferromagneticbehaviour at room temperature and both the susceptibility and coercive force ofZn0.95Mn0.05O are largerthan those of Zn0.97Mn0.03 and Zn0.93Mn0.07. This work demonstrates that Mn can be doped into nanosized ZnO by the method ofrheological phase reaction, which represents an important method to synthesize a nanosizeddiluted magnetic semiconductor.
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