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La0.5R0.5Ba2Cu3O7,Pr0.5R0.5Ba2Cu3O7以及RBa2Cu3o7(R=稀土)的键共价性计
引用本文:武志坚,杨明,张思远. La0.5R0.5Ba2Cu3O7,Pr0.5R0.5Ba2Cu3O7以及RBa2Cu3o7(R=稀土)的键共价性计[J]. 分子科学学报, 2000, 16(4): 202-205
作者姓名:武志坚  杨明  张思远
作者单位:1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室,吉林长春130022
2. 中国科学院长春应用化学研究所稀土化学与物理开放实验室,吉林长春130022;长春工程学院应用化学系,吉林长春130021
基金项目:国家自然科学基金,29871029,
摘    要:使用复杂晶体化学键理论计算了La0.5R0.5Ba2Cu3O7(R=Pr,Nd,Sm,Eu,Gd,Dy,Y,Ho,Er,Tm,Yb,Lu)(La-R123),Pr0.5R0.5Ba2Cu3O7(R=La,Nd,Sm,Eu,Gd,Dy,Ho,Y,Er,Tm,Yb,Lu)(Pr-R123)以及RBa2Cu3O7(R=La,Pr,Nd,Sm,Eu,Gd,Dy,Ho,Y,Er,Tm)(R123)中Cu-O键的键共价性,结果表明Pr-R123,La-R123,以及R123都应具有超导性,而实验结果是La0.5Pr0.5Ba2Cu07,R0.5,Pr0.5Ba2Cu3O7(R=La,Nd,Sm,Eu,Gd)无超导性,产生这种矛盾的原因尚不明确,需要做进一步的研究。

关 键 词:键共价性 Cu-O键 超导性 稀土 铜 复合氧化物
文章编号:1000-9035(2000)04-0202-04
修稿时间:2000-08-05

Calculation of chemical bond parameters in La0.5R0.5Ba2Cu3O7, Pr0.5R0. 5Ba2Cu3O7 and RBa2Cu3O7 (R=rare earth)
WU Zhi jian ,YANG Ming ,,ZHANG Si yuan. Calculation of chemical bond parameters in La0.5R0.5Ba2Cu3O7, Pr0.5R0. 5Ba2Cu3O7 and RBa2Cu3O7 (R=rare earth)[J]. Journal of Molecular Science, 2000, 16(4): 202-205
Authors:WU Zhi jian   YANG Ming     ZHANG Si yuan
Affiliation:WU Zhi jian 1,YANG Ming 1,2,ZHANG Si yuan 1
Abstract:Bond covalency in La 0.5 R 0.5 Ba 2Cu 3O 7(R=Pr,Nd,Sm,Eu,Gd,Dy,Y,Ho,Er,Tm,Yb,Lu),Pr 0.5 R 0.5 Ba 2Cu 3O 7(R=La,Nd,Sm,Eu,Gd,Dy,Ho,Y,Er,Tm,Yb,Lu) and RBa 2Cu 3O 7(R=La,Pr,Nd,Sm,Eu,Gd,Dy,Ho,Y,Er,Tm) was calculated using complex chemical bond theory. The results indicated that Pr-R123,La-R123, and R123 should all have superconductivity, while superconductivity in La 0.5 Pr 0.5 Ba 2Cu 3O 7,R 0.5 Pr 0.5 Ba 2Cu 3O 7(R=La,Nd,Sm,Eu,Gd) was not found from experiment. Further study is needed to resolve the discrepancy.
Keywords:bond covalency  La 0.5 R 0.5 Ba 2Cu 3O 7  Pr 0.5 R 0.5 ba 2Cu 3O 7  RBa 2Cu 3O  
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