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. 2019 Feb 21;9:2461. doi: 10.1038/s41598-019-39660-x

Figure 4.

Figure 4

Schematic representation of long-range ferromagnetic order in Cu-doped ZnO mediated through bound magnetic polarons at (a) low doping concentration of 0.05% and (b) high doping concentration of 2% Cu-doped ZnO.