OXYGEN DEFICIENCY AND SUPERCONDUCTIVITY IN ND2-XCEXCUO4

被引：26

作者：

KAWASHIMA, T

TAKAYAMAMUROMACHI, E

机构：

[1] National Institute for Research in Inorganic Materials, Tsukuba, Ibaraki, 305

来源：

PHYSICA C | 1994年 / 219卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90391-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The relationship between temperature and the oxygen-defect concentration in Nd2-xCexCuO4 was investigated in detail under an oxygen pressure of 10(-3) atm. The effect of the oxygen defects on superconductivity was studied for the range of Ce-content O.14 less than or equal to x less than or equal to 0.175. In a sample with x=O.15 or 0.16, a lesser amount of oxygen defects was needed to realize superconductivity compared with the case x=0.14. This suggests that introduction of oxygen defects works to add carriers (electrons) to the system. Oxygen defects, however, play some role in superconductivity besides carrier doping. The a-dimension of the present tetragonal system is well described by a function of the number of electrons doped i.e., oxygen-defect doping has the same effect on a as Ce-doping does.

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收藏

页码：389 / 394

页数：6

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