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采用固相反应法制备了名义组分为Zn_(0.95)Co_(0.05O)和Zn_(0.92)Co_(0.05)Mn_(0.03O)的块材样品.X射线衍射结果显示,除ZnO纤锌矿结构的主相外,掺杂样品中还存在立方相Co3O4.磁测量表明,ZnO中单独掺杂Co元素显示出微弱的铁磁性行为,Mn的引入极大地增强了样品的铁磁性,但两个样品在低温下(<50K)表现出截然不同的磁化行为.同时,反铁磁相Co3O4的存在极大地抑制了样品中的铁磁性耦合作用.
Solid samples were prepared by the solid-state reaction method with Zn 0.99 Co 0.05 0.05 and Zn 0.92 Co 0.05 Mn 0. X-ray diffraction results show that in addition to ZnO wurtzite In addition, the cubic phase Co3O4 also exists in the doped samples.The magnetic measurements show that Co doped with ZnO shows weak ferromagnetism in ZnO, and the introduction of Mn greatly enhances the ferromagnetism of the samples, but two The samples show distinct magnetization behavior at low temperature (<50K), while the presence of antiferromagnetic Co3O4 greatly inhibits the ferromagnetic coupling in the sample.