PARTIAL MELTING OF YTTRIUM-EXCESS YBA2CU3OY SUPERCONDUCTORS

被引：6

作者：

LEE, EH

OH, SH

YOON, SY

机构：

[1] Materials and Devices Research Center, Samsung Advanced Institute of Technology, Kyunggi-do

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1992年 / 31卷 / 5A期

关键词：

OXIDE SUPERCONDUCTOR; YBA2CU3OY; Y2BACUO5; PARTIAL MELTING; FLUX PINNING CENTER;

D O I：

10.1143/JJAP.31.1318

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Yttrium-excess YxBa2Cu3Oy (1.00 less-than-or-equal-to x less-than-or-equal-to 1.25) superconductors have been fabricated by a combination process of ordinary solid-state reaction and partial melting. Sintering the yttrium-excess YxBa2Cu3Oy results in extremely small grains, which in turn produce uniformly distributed fine Y2BaCuO5 during partial melting. Y2BaCuO5 acts as the nucleation site for peritectic reaction. The unreacted Y2BaCuO5 seems to act as a flux pinning center. Due to this flux pinning force, the yttrium-excess YxBa2Cu3Oy superconductors have very high critical current densities of about 22,000 A/cm2 (at 77 K, 1 T).

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页码：1318 / 1322

页数：5

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