Giant abrupt changes in the magnetic flux distribution in niobium foils were studied by using magneto-optical visualization, thermal and magnetic measurements. Uniform flux jumps and sometimes almost total catastrophic collapse of the critical state are reported. Results are discussed in terms of thermomagnetic instability mechanism with different development scenarios.
@article{arxiv.cond-mat/0607244,
title = {Collapse of the critical state in superconducting niobium},
author = {Ruslan Prozorov and Daniel V. Shantsev and Roman G. Mints},
journal= {arXiv preprint arXiv:cond-mat/0607244},
year = {2007}
}
Comments
arXiv.org produced artifacts in color images (three versions were attempts to make better images). Download clean PDF and watch video-figures at: "http://cmp.ameslab.gov/supermaglab/video/Nb.html"