Measurements of the levitation forces for a bulk Gd-Ba-Cu-O superconductor in high magnetic fields

被引：6

作者：

Suzuki, T.

Araki, S.

Takeuchi, K.

Murakami, M.

Nagashima, K.

Miyazaki, Y.

Seino, H.

Sakai, N.

Hirabayashi, I.

Sawa, K.

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Syst Design Engn, Kohoku Ku, Yokohama, Kanagawa 2238522, Japan

[2] Shibaura Inst Technol, Minato Ku, Tokyo 1088548, Japan

[3] Railway Tech Res Inst, Tokyo 1858540, Japan

[4] ISTEC, Superconduct Res Lab, Tokyo 1350062, Japan

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2007年 / 463卷 / 383-386期

关键词：

levitation; relaxation; flux creep; Gd-Ba-Cu-O;

D O I：

10.1016/j.physc.2007.04.281

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We studied the effects of magnetic field and the temperature on the levitation force for a bulk Gd-Ba-Cu-O superconductor 60 mm in diameter and 20 mm in thickness. Magnetic field distribution in the bulk body was monitored with Hall sensors placed on the sample surface. The sample was placed 10 mm below the magnetic center of a superconducting solenoid coil. The sample was cooled in zero-field mode, and the magnetic field was increased from 0 to 5 T. Therefore, the levitation force which acts downward was measured at various temperatures. After measuring the levitation force, its time relaxation was also measured for I h while applying 5 T. The levitation force could be increased with increasing magnetic field in all the temperature range. Lowering temperature was effective in increasing the levitation force and reducing its time relaxation. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：383 / 386

页数：4

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