Measuring the interaction force between a high temperature superconductor and a permanent magnet
Abstract
Repulsive and attractive forces are both possible between a superconducting sample and a permanent magnet, and they can give place to magnetic levitation or free-suspension phenomena, respectively. We show experiments to quantify this magnetic interaction which represents a promising field regarding to short-term technological applications of high temperature superconductors. The measuring technique employs an electronic balance and a rare-earth magnet that induces a magnetic moment in a melt-textured YBa2Cu3O7 superconductor immersed in liquid nitrogen. The simple design of the experiments allows a fast and easy implementation in the advanced physics laboratory with a minimum cost. Actual levitation and suspension demonstrations can be done simultaneously as a help to interpret magnetic force measurements.
Cite
@article{arxiv.cond-mat/9905084,
title = {Measuring the interaction force between a high temperature superconductor and a permanent magnet},
author = {S. O. Valenzuela and G. A. Jorge and E. Rodriguez},
journal= {arXiv preprint arXiv:cond-mat/9905084},
year = {2009}
}
Comments
12 pages and 3 figures in postscript