Defect induced room temperature ferromagnetism in high quality Co-doped ZnO bulk samples - Godoy, M. P. F. de; Gratens, Xavier Pierre Marie; Chitta, Valmir Antonio; Mesquita, A.; Lima Jr., M.M. de; Cantarero, A.; Rahman, G.; Morbec, J. M.; Carvalho, H. B. de (Journal of Alloys and Compounds, 2021)