Room temperature ferromagnetism and optical property of Zn1−xCoxS nanorods

Abstract In this paper, ZnS:Co 2+ nanorods (NRs) have been synthesized by a simple hydrothermal method with ethylenediamine as the oriented-assembly agent at 180 °C. The results showed that the Co 2+ ions substituted for the Zn 2+ sites in the host ZnS, and the maximum concentration of the Co 2+ ions in the ZnS NRs was 4.69%. No Co-related emission peak can be observed and the emission intensity of the ZnS:Co 2+ NRs was decreased, indicating that the Co 2+ ions only acted as the nonradiative center. The Zn 1− x Co x S NRs showed the room temperature ferromagnetism property, and the magnetic saturation (Ms) value was increased as the Co 2+ doped ratio increased.