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Superconductivities ofn‐type Nd1.85Ce0.15CuO4−yprepared under high pressure

 

作者: C. Q. Jin,   Y. S. Yao,   B. Q. Wu,   Y. F. Xu,   S. C. Liu,   W. K. Wang,  

 

期刊: Applied Physics Letters  (AIP Available online 1991)
卷期: Volume 59, issue 26  

页码: 3479-3481

 

ISSN:0003-6951

 

年代: 1991

 

DOI:10.1063/1.105659

 

出版商: AIP

 

数据来源: AIP

 

摘要:

In this work we provide the report on the preparation of a bulkn‐type NdCeCuO superconductor using a high‐pressure high‐temperature sintering procedure. The superconductor was obtained by sintering as‐prepared material at 4.0 GPa at 530 °C for 20 min and required no additional reducing treating. The sample shows a higher onset temperatureTcon(32 K), a higher zero resistance temperatureTc0(22 K), and a much lower resistivity than a standard bulk sample. Indeed the room‐temperature resistivity and the quasimetallic resistivity in the normal state for our polycrystalline sample are similar to those of single crystals. This high‐pressure sintering procedure reduces weak link effects and opens the possibility of preparing high‐quality bulkn‐type superconductors.

 

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