Computational Materials Science Group

D Kaptás, T Kemény, LF Kiss, J Balogh, László Gránásy^1,2, I Vincze

¹Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, P.O. Box 49, Budapest H-1525, Hungary
²BCAST, Brunel University, Uxbridge, Middlesex, UB8 3PH, United Kingdom

The spin-glass and the ferromagnetic transitions of amorphous Fe100-xZrx (7 less-than-or-equal-to x less-than-or-equal-to 12) alloys in a small applied field (13 mT) were investigated by use of Fe-57 Mossbauer spectroscopy. The observed linewidth increase over a wide (almost-equal-to 30 K) temperature range both below and above the transition temperature gives clear evidence of a magnetic relaxation.