Properties of the Ln2BaCuO5 (Ln = Nd, Sm, Dy, Ho, Tm, Yb) cuprates

被引：0
|
作者：
Klyndyuk, AI [1 ]
Petrov, GS [1 ]
Masyuk, SV [1 ]
Bashkirov, LA [1 ]
机构：
[1] Belarussian State Technol Univ, Minsk 220630, BELARUS
来源：
INORGANIC MATERIALS | 1999年 / 35卷 / 10期
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The thermal expansion and electrical conductivity of Ln(2)BaCuO(5) (Ln = Nd, Sm, Dy, Ho, Tm, Yb) were measured in air at temperatures from 293 to 1073 K. All of the materials were found to exhibit semiconducting behavior. As the ionic radius of Ln(3+) decreases, the: conductivity of Ln(2)BaCuO(5) drops, and the activation energy of conductivity rises-from 26.4 kJ/mol for Ln = Nd to 66.4 kJ/mol for Ln = Yb. Over the entire temperature range examined, the linear thermal expansion coefficient of all the Ln(2)BaCuO(5) compounds studied is independent of the nature of the rare-earth ion and falls in the range (11-13) x 10(-6) K-1.
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页码：995 / 997
页数：3
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