Figure 6
SQUID measurement of magnetic properties. (a) M-H curves of 1 at% (blue triangle), 5 at% (red dot) and 9 at% (black square) Mn-doped ZnO nanoparticles taken at 300 K. (b) The enlarged area of low magnetic field of (a). (c) ZFC and FC plot of 1 at% Mn-doped ZnO nanoparticles measured under an applied field of 20 Oe.