OBSERVATION OF FLUX MOVEMENT IN QUENCH-AND-MELT-GROWN YBCO GENERATED BY A PULSED MAGNETIC-FIELD

被引：10

作者：

TAKIZAWA, T

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 | 1993年 / 32卷 / 6A期

关键词：

OXIDE SUPERCONDUCTORS; Y-BA-CU-O; QUENCH-AND-MELT GROWTH; CRITICAL CURRENT DENSITY; FLUX MOTION; FLUX JUMP; CRITICAL STATE MODEL;

D O I：

10.1143/JJAP.32.L774

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dynamics of the quantized flux in a ring-shaped YBa2Cu3O7 sample has been studied through the observation of the magnetic flux motion generated by a pulsed magnetic field. The flux speed is obtained as a function of the rise rate of the external field and as a function of temperature. It is shown that the flux speed is not intrinsic as determined by the creep theory but is determined by the external field and the J(c) value. To interpret the slow rise of the observed signal, a distribution of different kinds of pinning centers in a sample is suggested.

引用

页码：L774 / L777

页数：4

共 7 条

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