NEW HIGH-PRESSURE SR-CA-CU-O COMPOUNDS AND THEIR SUPERCONDUCTING PROPERTIES

被引：12
|
作者：
ADACHI, S [1 ]
YAMAUCHI, H [1 ]
TANAKA, S [1 ]
MORI, N [1 ]
机构：
[1] UNIV TOKYO, INST SOLID STATE PHYS, MINATO KU, TOKYO 106, JAPAN
来源：
JOURNAL OF SUPERCONDUCTIVITY | 1994年 / 7卷 / 01期
关键词：
SR-CA-CU-O SUPERCONDUCTOR; HIGH-PRESSURE SYNTHESIS; OXIDIZER; 0223; STRUCTURE; INFINITE-LAYER STRUCTURE;
D O I：
10.1007/BF00730368
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
It is shown for (Sr,Ca)1-yCuO2.00+z (nominal composition) superconductors fabricated under a high pressure of 5 GPa and at 930-degrees-C that, as z increases, the Meissner fraction increases from a few percent to 20% and then starts to decrease. In the X-ray powder diffraction pattern for the sample with the maximum Meissner fraction, it is obvious that the ''infinite-layer'' structure has been decomposed and a new structure becomes the major phase. It appears that the new structure is the ''0223'' structure which consists of rock-salt and the ''infinite-layer'' type blocks. This material is likely to be a new superconducting cuprate.
引用
收藏
页码：55 / 58
页数：4
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