2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/19716Magneto-optical properties of ZnO:Co and ZnO:Ni films were measured. Magnetization measurements show that some of the films are paramagnetic and others are ferromagnetic. Magnetic circular dichroism clarified that Zn1-xCoxO and Zn1-xNixO included in samples are paramagnetic diluted magnetic semiconductors. Ferromagnetic precipitations seem to be responsible for the observed ferromagnetic behaviors. Criteria to judge the ferromagnetic DMS are also discussed.6 pages, 8 figures, 7th Symposium on the Physics and Application of Spin-Related Phenomena in Semiconductors (PASPS) Dec.17-18, 2001, YokohamaMaterials Sciencetext