Paramagnetic behavior of Zn1-xMnxO at room temperature

Mn-doped ZnO were synthesized by solid state reaction and sol-gel method respectively. It was found that samples synthesized by solid state reaction containing Mn2O3 and MnO2 are a mixture of ferromagnetic and paramagnetic phases. Contrary, samples without second phases were found to be paramagnetic at room temperature. According to previous report, interface effects between Zn-rich Mn2O3 and MnO2 interfaces may be the origin of the ferromagnetic behavior observed in Our samples prepared by solid reaction, so the alloy of Zn1-xMnxO may be paramagnetic at room temperature. Prepared by sol-gel technique, the samples Without second phases in the XRD patterns are also room-temperature paramagnetic. Therefore we believe that the magnetism of Zn1-xMnxO is paramagnetic at room temperature. (C) 2008 WILEY-VCH GmbH & Co. KGaA, Weinbeim.