Muon Spin Relaxation Study of Reentrant Spin Glasses: Amorphous-Fe_{1-x}Mn_x

M. J. P. Gingras; M. Larkin; I. Mirebeau; W. D. Wu; K. Kojima; G. M. Luke; B. Nachumi; Y. J. Uemura

paper

Muon Spin Relaxation Study of Reentrant Spin Glasses: Amorphous-Fe_{1-x}Mn_x

arXiv:cond-mat/9709190

Abstract

We have performed an extensive muon spin relaxation study of the well known (Fe $_{1 - x}$ Mn $_{x}$ ) $_{75}$ P $_{16}$ B $_{6}$ Al $_{3}$ 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, $T_{c}$ , and at $T_{f}$ ( $T_{f} < T_{c}$ ) that corresponds to the onset of strong bulk magnetic irreversabilities. We find no critical dynamic signature of a freezing of the transverse $X Y$ spin components at an intermediate temperature $T_{x y}$ ( $T_{f} < T_{x y} < T_{c}$ ) where extra static order not contributing to the magnetization starts developping.

Letter, 3 POSTSCRIPT figures included. Submitted to Physical Review Letters. Contact: [email protected]