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[1]
Structural analysis of nonlinearities of Ca4ReO（BO3）3 （Re = La, Nd, Sm, Gd, Er, Y）[J] . D. Xue,S. Zhang.Applied Physics A Materials Science ＆ Processing . 1999 (1)
InvestigationofChemicalBondPropertiesandMssbauerSpectroscopyinYBa2Cu3O7
被引：0
作者：
高发明
李东春
张思远
机构：
[1] College of Materials Science and Chemical Engineering Yanshan University
[2] Changchun Institute of Applied Chemistry Academia S inica Q inghuangdao
[3] China
[4] Q inghuangdao
[5] Changchun
[6] China
关键词：
physical chemistry;
mssbauer spect roscopy;
chemical bond;
superconductor;
rare earths;
D O I：
暂无
中图分类号：
O482.5 [磁学性质];
学科分类号：
070205 ;
0805 ;
080502 ;
0809 ;
摘要：
Chemical bond properties of YBa 2Cu 3O 7 were studied by using the average ba nd-gap model. The calculated results show that the covalency of Cu(1)-O bond i s 0.406, and one of Cu(2)-O is 0.276. Mssbauer isomer shifts of 57Fe in Y-123 were calculated by the chemical surrounding factor h v defined b y covalency and electronic polarizability. The charge-state and site of Fe were determined. The relation between the coupling constant of electron-phonon inte raction and covalency is employed to explain that the Cu(2)-O plane is more im portant than the Cu(1)-O chain on the superconductivity in the Y-123 compound s.
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页码：60 / 63
页数：4
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