通过协同控制固相反应气氛和温度制备了接近化学计量的PrBa2Cu3O7多晶体.样品的X-射线衍射(XRD)未能检测出杂相.对XRD数据作Reweld拟合,分析其结果,表明Pr占据Ba位非常少(≤1%).磁测量显示Pr的反铁磁序温度为19.0K,比前人报导值高出2K,进一步证实样品中仅含有很少的Pr占据Ba位的缺陷.电、磁测量未能检测到任何超导迹象,说明PrBa2Cu3O7本身不是一个超导体.
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