Growth of high purity YBa2Cu4O8 and Y2Ba4Cu7O15-delta single crystals in BaZrO3 crucibles under high oxygen pressure, and absence of magnetic ''fishtail'' effect.

被引：7

作者：

Genoud, JY ^{[1
]}

Erb, A ^{[1
]}

Revaz, B ^{[1
]}

Junod, A ^{[1
]}

机构：

[1] UNIV GENEVA,DEPT PHYS MAT CONDENSEE,CH-1211 GENEVA 4,SWITZERLAND

来源：

PHYSICA C | 1997年 / 282卷

关键词：

D O I：

10.1016/S0921-4534(97)00311-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the first I-ITS crystal growth in BaZrO3 crucibles under very high gas pressure. YBa2Cu4O8 (Y124) crystals were grown in an autoclave under 1400 bar of pure oxygen. The eutectic temperature was determined to be 1113 degrees C. X-ray analysis and electronic (EDX) micrographs showed that the crystals were contamination-free. The high (T-c=81.5K) and sharp superconducting transition and the small magnetic hysteresis further established the purity of these Y124 crystals. In particular, no ''fishtail'' anomaly, but a monotonous decrease of the hysteresis was observed in magnetic fields up to 5.5T and down to 10K. The use of BaZrO3 crucibles shows that this stoechiometric and untwinned compound exhibits an intrinsically low pinning.

引用

页码：457 / 458

页数：2

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