Co掺杂ZnO块材的晶体结构和磁性能研究  

Investigation of Crystal Structure and Magnetic Properties for Co-doped ZnO bulks

作　　者：彭龙[1] 张怀武[1] 宋远强[1] 沈健[1] 

机构地区：[1]电子薄膜与集成器件国家重点实验室,电子科技大学,成都610054

出　　处：《纳米科技》2008年第4期37-41,49,共6页

摘　　要：采用固相法制备了Zn1-xCoxO（x=0．05-0．25）块材，烧结温度和Co含量对Zn1-xCoxO（x=0．05-0．25）块材的晶体结构和室温磁性能影响强烈，当x≤0．1，烧结温度从800增加到1100℃时，Zn1-xCoxO（x=0．05-0．25）呈现出单相结构，但当x〉0．1，烧结温度为800℃时，样品中出现CoO相；随着烧结温度提高到900℃，样品再次获得纯的单相结构。为了获得高的饱和磁化强度Ms，最佳烧结温度应该根据Co含量进行调整。在最佳烧结温度条件下，当x从0．05提高到0．1时，Ms从0．79增加到了1．06μB/Co，但当x继续提高到0．2和0．25时，Ms分别降低到了0．59和0．41μB/Co。The sintering temperature and Co concentration have great effect on the crystal structure and magnetic properties at room temperature for the Zn1-xCoxO （x=0.05-0.25） bulks prepared by solidstate reaction method. No secondary phase is detected for the bulks sintered from 800 to 1100 ℃ when x≤0.1. But CoO phase presents when x〉0.1 for the bulks sinter at 800 ℃, however the pure single phase can also be observed when sintering temperature increases to 900℃. In order to obtain high saturation magnetization M,, the optimum sintering temperature must be adjusted with Co concentration. At the optimum sintering temperature, the M, increases from 0.79 to 1.06μB/Co when x increases from 0.05 to 0.1, but it decreases to 0.59 and 0.41μB/Co with x further increases to 0.2 and 0.25.

关 键 词：DMSs Co掺杂ZnO 晶体结构 磁性能 

分 类 号：O75[理学—晶体学]