Lateral force on a magnet placed above a planar YBa2Cu3Oxsuperconductor
作者:
T. H. Johansen,
Z. J. Yang,
H. Bratsberg,
G. Helgesen,
A. T. Skjeltorp,
期刊:
Applied Physics Letters
(AIP Available online 1991)
卷期:
Volume 58,
issue 2
页码: 179-181
ISSN:0003-6951
年代: 1991
DOI:10.1063/1.104965
出版商: AIP
数据来源: AIP
摘要:
The lateral force interaction between a permanent bar magnet and a large slab of highTcsuperconductor has been investigated at 77 K, under conditions of a constant vertical separation of 2 mm. The restoring force as a function of lateral displacement rises very steeply, and reaches 90% of its saturation value, 5.1 mN, after 1.8 mm. The profile of the force‐displacement curve is in qualitative agreement with the existing theory. A significant quantitative discrepancy is interpreted as due to a theoretical penetration depth exceeding the sample thickness. The lateral magnetic stiffness or spring constant, is found to be independent of displacement away from lateral equilibrium.
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