高压处理对稀磁半导体Zn_(1-x)Mn_xO磁性的影响  

EFFECT OF HIGH PRESSURE ON MAGNETIC BEHAVIOR OF Zn_(1-x)Mn_xO

作　　者：李建青[1,2] 马争争[2] 陈子鹏[2] 范端[2] 

机构地区：[1]华中科技大学物理学院,武汉430074 [2]武汉理工大学理学院,武汉430070

出　　处：《低温物理学报》2009年第2期131-134,共4页Low Temperature Physical Letters

基　　金：国家自然科学基金(项目编号:10574049);国家973计划(项目编号:2006CB921606)资助的课题~~

摘　　要：用固相反应法制备出过渡金属Mn掺杂的ZnO系列样品,并对其进行了高压处理.高压处理后的样品,通过扫描电子显微镜和X射线衍射仪进行了微观结构的表征分析,通过磁性能的测量,初步研究了压力对Mn掺杂ZnO稀磁半导体磁性能的影响.结果表明:适当的高压处理可以有效增强材料的室温铁磁性,但当压力超过一定值后,压力会使材料的磁性能下降.Samples with nominal composition of Zn1-xMnxO prepared by a standard solid-state reaction method were processed under different high pressure. The microstructure of the obtained samples were character- ized by scanning electron microscopy and X-ray diffraction. Effect of pressure on ferromagnetic behavior was studied by the measurement of magnetization. The results show that the appropriate pressure can rein- force the magnetism of the samples, however, the ferromagnetism would be decreased when the pressure increases to a higher value.

关 键 词：稀磁半导体 氧化锌 高压 磁性 

分 类 号：O472.5[理学—半导体物理]