Annealing effect on high-pressure oxygen for (As0.33Cu0.67)Sr2YCu2Oy

被引：0
|
作者：
Sato, E [1 ]
Kambe, S [1 ]
Ishii, O [1 ]
机构：
[1] Yamagata Univ, Grad Sch Sci & Engn, Yamagata 9928510, Japan
来源：
PHYSICA C | 2001年 / 357卷
关键词：
(As0.13Cu0.67)Sr2YCu2Oy; crystal structure; physical properties;
D O I：
10.1016/S0921-4534(01)00261-1
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigated the new layered copper oxide, (As0.33Cu0.67)Sr2YCu2O7.17. It had an anomalous change in resistivity below 60 K. However, resistivity and magnetic susceptibility measurements showed that (As0.33Cu0.67)Sr2YCu2O7.17 was not superconducting but semiconducting. From the X-ray diffraction data, it was found that nonsuperconductivity of (As0.33Cu0.67)Sr2YCu2O7.17 comes from the existence of two oxygen sites in the (As, Cu)O-7.17 layer. In order to increase the oxygen content, annealing under high oxygen pressure (450 atm) at 400 degreesC for 19 h was carried out. The specimen did not show superconductivity yet but showed a metallic property together with a drastic decrease in resistivity. (C) 2001 Elsevier Science B.V. All rights reserved.
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页码：397 / 400
页数：4
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