INFLUENCE OF OXYGEN DEFICIENCY ON THE CRITICAL CURRENT PROPERTIES OF MPMG-PROCESSED YBA2CU3O7-DELTA

被引：10

作者：

NAKAMURA, N

MURAKAMI, M

FUJIMOTO, H

KOSHIZUKA, N

机构：

[1] Superconductivity Research Laboratory, ISTEC, Koto-ku, Tokyo, 135

来源：

CRYOGENICS | 1992年 / 32卷 / 11期

关键词：

CRITICAL CURRENT; IRREVERSIBILITY LINE; FLUX PINNING;

D O I：

10.1016/0011-2275(92)90005-U

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The critical current density and the irreversibility field for melt - powder - melt - growth (MPMG)-processed YBa2CU3O7-delta samples are determined magnetically in fields parallel to the c axis. Both J(c) and B(irr) are depressed with increase of oxygen deficiency. B(irr) is not depressed appreciably with decrease of the concentration Of Y2BaCuO5 precipitates in spite of a significant depression of J(c). A bump structure in the J(c)(B) curve is observed and varies systematically with the oxygen deficiency. These results are compared to flux-pinning models.

引用

页码：949 / 953

页数：5

共 24 条

[21] RELATION BETWEEN SUPERCONDUCTING TRANSITION-TEMPERATURE AND OXYGEN ORDERING IN YBA2CU3O6+X [J].

POULSEN, HF ;

ANDERSEN, NH ;

ANDERSEN, JV ;

BOHR, H ;

MOURITSEN, OG .

NATURE, 1991, 349 (6310) :594-596

[22] THE INFLUENCE OF A POINT-DEFECT STRUCTURE ON THE MAGNETIC-PROPERTIES OF YBA2CU3O7-DELTA-POLYCRYSTALS [J].

THEUSS, H ;

KRONMULLER, H .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1991, 177 (1-3) :253-261

[23]

Tinkham M., 1975, INTRO SUPERCONDUCTIV

[24] GIANT FLUX CREEP AND IRREVERSIBILITY IN AN Y-BA-CU-O CRYSTAL - AN ALTERNATIVE TO THE SUPERCONDUCTING-GLASS MODEL [J].

YESHURUN, Y ;

MALOZEMOFF, AP .

PHYSICAL REVIEW LETTERS, 1988, 60 (21) :2202-2205

← 1 2 3 →