%0 Journal Article
%T Measuring the interaction force between a high temperature superconductor and a permanent magnet
%A S. O. Valenzuela
%A G. A. Jorge
%A E. Rodriguez
%J Physics
%D 1999
%I arXiv
%R 10.1119/1.19160
%X 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.
%U http://arxiv.org/abs/cond-mat/9905084v1