Figure 11

Magnetization as a function of applied field at 2 K for Zn _0.89 Co _0.11 O and Zn _{1- x} Co _x O NWs. (a) Magnetization as a function of applied field at 2 K for as-implanted (squares), argon-annealed (circles), and vacuum-annealed (triangles) Zn_0.89Co_0.11O NWs. (b) Magnetization as a function of applied field at 2 K for argon-annealed Zn_1-xCo _x O NWs. Reprinted with permission from Jian et al. [58].