TRAINS OF FLUX JUMPS OBSERVED IN A QUENCH-AND-MELT-GROWN YBA2CU3O7 UNDER PULSED MAGNETIC-FIELD

被引：6

作者：

TAKIZAWA, T

ITOH, T

TANIMURA, Y

KANBARA, K

MORITA, M

HASHIMOTO, M

机构：

[1] CLEAR TECHNOL, TAMA, TOKYO 206, JAPAN

[2] NIPPON STEEL CORP LTD, ADV MAT & TECHNOL RES LABS, NAKAHARA KU, KAWASAKI 211, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1994年 / 33卷 / 5A期

关键词：

OXIDE SUPERCONDUCTORS; YBA2CU3O7; QUENCH-AND-MELT GROWTH; CRITICAL CURRENT DENSITY; FLUX MOTION; FLUX JUMP; FLUX PINNING; CRITICAL STATE MODEL;

D O I：

10.1143/JJAP.33.L631

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The motion of quantized fluxes in ring-shaped YBa2Cu3O7 samples has been observed under pulsed magnetic field in the 15 K to critical temperature (T(c) range. Successive flux jumps have been observed in a low-J(c) sample, where J(c) is the transport critical current density. All these jumps are determined by the Lorentz force, and not by the thermal avalanche conditions. It is suggested that the trains of jumps are caused by the weakened pinning force in a degraded sample.

引用

页码：L631 / L634

页数：4

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