作　　者： ; ; (叶红娟）; (傅柔励）; (蒋伟）; (褚君浩）; (陈举新）; (刘竞青）; (赵忠贤）;

机构地区： 中科院红外物理国家实验室

出　　处： 《低温物理学报》 1995年第3期185-190,共6页

摘　　要： 本文报道了陶瓷和薄膜ＰｒＢａ２Ｃｕ３Ｏ７材料的红外和远红外反射谱，从陶瓷和薄膜样品的声子谱的比较中萃取ＰｒＢａ３Ｃｕ３Ｏ７材料沿着ｃ轴振动的Ｂ（１ｕ）模分别位于１１０，１５８，１９４，２０２，３９５，５８０ｃｍ（－１）．ＰｒＢａ２Ｃｕ３Ｏ７和ＹＢａ２Ｃｕ３Ｏ（７－δ）有类似的晶体结构，分析和比较这两种材料的声子谱，尤其是沿着ｃ轴振动的Ｂ（１ｕ）模，我们认为Ｐｒ的Ｂ（１ｕ）模位于１９４ｃｍ（－１），并由此而建议从红外测试结果来分析Ｐｒ在ＰｒＢａ２Ｃｕ３Ｏ７材料中的化学价应大于正３价． Abstract This paper presents the far infrared and infrared spectra of Ceramic and film of PrBa2Cu3O7. Comparing the phonon spectra of Ceramic PrBa2Cu3O7 with the that of PrBa2Cu3O7 film, it isfound that the B1u modes vibrating along c-axis of PrBa2Cu3O7 are located at 110,158, 194, 202, 395, 580cm- 1. Because both PrBa2Cu3O7 and YBa2Cu3O7-δ possess same crystal structure, on the basis of comparing and analysing phonon modes of this two materials, aspecially the B1u modes, it is inferedthat B1u modeof Pr is at 194cm-1, therefore infrared measurementssuggest that the valence of Pr in PrBa2Cu3O7 is largerthan 3+.

关 键 词： 超导体 红外光谱 镨 价态 薄膜 陶瓷

领　　域： [理学] [理学] [电气工程] [一般工业技术]