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Browse Journals & Magazines > Review of Scientific Instrume ...> Volume:61 Issue:12 Help

A pendulum feedback system to measure the lateral force on a magnet placed above a high‐Tc superconductor

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5 Author(s)
Johansen, T.H. ; Department of Physics, University of Oslo,P.O. Box 1048, Blindern, 0316 Oslo 3, Norway ; Bratsberg, H. ; Yang, Z. ; Helgesen, G.
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Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1141508 

Based on a simple mechanical pendulum design, we developed a sensor for measurement of the horizontal force on a permanent magnet placed at any distance above a high‐Tc superconductor. In this fully computerized system, which employs closed‐loop feedback control, the lateral interaction with its restoring and hysteretic nature can be studied under conditions of constant vertical separation. Results are presented for the case of a small Nd‐Fe‐B magnet at a distance of 1 mm above a large planar disk of a YBa2Cu3Ox superconductor.

Published in:
Review of Scientific Instruments  (Volume:61 ,  Issue: 12 )

Date of Publication: Dec 1990

Page(s):
3827 - 3829
ISSN :
0034-6748
Digital Object Identifier :
10.1063/1.1141508
Date of Current Version :
18 June 2009
Issue Date :
Dec 1990

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