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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