采用高能离子注入的方式,在半绝缘性的GaAs衬底中掺杂引入Mn离子制备了磁性半导体.借助于X-射线衍射仪(XRD)进行了结构分析,没有发现新的衍射峰,并运用高分辨率X射线衍射仪(HR-XRD)分析了Mn离子注入后衬底(004)峰的微小变化.根据原子力显微镜的结果发现,注入后的样品表面没有发生明显的变化.通过使用超导量子干涉仪SQUID进行变温分析,在所分析范围内M-T曲线存在拐点,但其所对应的铁磁性转变温度低于室温.
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