Elimination of oxygenation cracks in top-seeded melt-growth YBCO superconductors by high pressure oxygenation

被引：25

作者：

Diko, P. ^{[1
]}

Chaud, X. ^{[2
]}

Antal, V. ^{[1
]}

Kanuchova, M. ^{[1
]}

Sefcikova, M. ^{[1
]}

Kovac, J. ^{[1
]}

机构：

[1] Slovak Acad Sci, Inst Expt Phys, Kosice 04001, Slovakia

[2] CNRS CRETA, F-38042 Grenoble 9, France

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2008年 / 21卷 / 11期

关键词：

D O I：

10.1088/0953-2048/21/11/115008

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

As-grown YBa(2)Cu(3)O(7) bulk superconductors have low oxygen content, YBa(2)Cu(3)O(6.3), are not superconducting, and must be oxygenated to form YBa(2)Cu(3)O(7). During standard oxygenation at 400 degrees C the shortening of crystal lattice parameters causes intensive cracking. The created cracks allow oxygen penetration into the bulk and cause the oxygenation time to be technologically acceptable but reduce significantly the superconducting properties. Here we show that it is possible to eliminate the formation of oxygenation cracks and to reach a critical current density 2.5 times higher than in bulk oxygenated in a standard way. The oxygenated crack-free samples were obtained by high pressure oxygenation with progressively increasing oxygen partial pressure.

引用

页数：3

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