We have performed an extensive muon spin relaxation study of the well known (Fe1−xMnx)75P16B6Al3 reentrant spin glass. We find a strong increase of the dynamic as well as static muon depolarization rate at the paramagnetic to ferromagnetic transition temperature, Tc, and at Tf (Tf<Tc) that corresponds to the onset of strong bulk magnetic irreversabilities. We find no critical dynamic signature of a freezing of the transverse XY spin components at an intermediate temperature Txy (Tf<Txy<Tc) where extra static order not contributing to the magnetization starts developping.
@article{arxiv.cond-mat/9709190,
title = {Muon Spin Relaxation Study of Reentrant Spin Glasses: Amorphous-Fe_{1-x}Mn_x},
author = {M. J. P. Gingras and M. Larkin and I. Mirebeau and W. D. Wu and K. Kojima and G. M. Luke and B. Nachumi and Y. J. Uemura},
journal= {arXiv preprint arXiv:cond-mat/9709190},
year = {2009}
}