Effect of defect complex on magnetic properties of (Fe, Mn)-doped ZnO thin films

We have observed room temperature ferromagnetism in Mn-doped and (Fe, Mn)-codoped ZnO thin films grown under different oxygen partial pressures by pulsed laser deposition. The X-ray diffraction and optical transmission spectra studies demonstrate the natural incorporation of Fe and Mn cations into wurtzite ZnO lattices. The effects of transition metal doping and defects on the magnetic properties was investigated. It is found that room temperature ferromagnetism is sensitive to oxygen vacancy and Zn vacancy. The absence of ferromagnetism in pure ZnO films grown under different oxygen partial pressures reveals that the transition metal ions should also play an important role in inducing the ferromagnetism.

锰-锌功率软磁铁氧体料粉及其制备方法

本发明涉及一种锰锌功率软磁铁氧体料粉及其制备方法。以Fe2O3、Mn3O4、ZnO为主要原料，通过混合、预烧、粗粉碎、砂磨、喷雾造粒五个工序制成锰锌功率软磁铁氧体料粉，制成的料粉功耗较低，饱和磁感应强度Bs高，性能优越，成本低廉。