利用固态反应法合成了纯相的CuAlO2和过渡金属元素Co掺杂的CuAlO2样品.通过X射线衍射仪分析可知:未掺杂样品和1％(摩尔分数)Co掺杂的样品都是单相,其中没有CuO等杂相存在,而掺杂浓度分别为5％、10％和20％的样品中都出现了CuAlO2以外的杂相,这表明Co在CuAlO2粉体样品中的杂质固溶度一般低于5％.综合物性测试系统测得的与磁性有关数据表明:未掺杂及Co掺杂(1％)的纯相CuAlO2样品只具有顺磁性,而多相的Co掺杂样品从5～300K都没有表现出如第一性原理理论所预言的铁磁性,这说明样品中所掺入的Co离子只是具有局域磁矩的顺磁杂质中心,并不能形成长程的铁磁序,进一步表明基于第一性原理的理论计算可能高估了过渡金属磁性杂质在氧化物半导体这种关联体系中的铁磁耦合作用.
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