Electromagnetic radiation produced by avalanches in the magnetization reversal of Mn12-Acetate has been measured. Short bursts of radiation have been detected, with intensity significantly exceeding the intensity of the black-body radiation from the sample. The model based upon superradiance from inversely populated spin levels has been suggested.
@article{arxiv.cond-mat/0310385,
title = {Electromagnetic radiation produced by avalanches in the magnetization reversal of Mn12-Acetate},
author = {J. Tejada and E. M. Chudnovsky and J. M. Hernandez and R. Amigo},
journal= {arXiv preprint arXiv:cond-mat/0310385},
year = {2009}
}