Effect of different Mn doping and point vacancy ratios on the magnetic properties of ZnO Qingyu Hou, Yuqin Guan and Zhichao Wang Eur. Phys. J. Appl. Phys., 94 2 (2021) 20101 Published online: 19 May 2021 DOI: 10.1051/epjap/2021210012