Magnetic behavior of PdFeMn on mesoscopic and macroscopic length scales

By 3D neutron depolarization (ND) the magnetization and the domain structur e were observed for FC and ZFC samples of (Pd0.9965Fe0.0035)1-Mn-x with x = 0.05, showing both an FM and a spin-glass-like transition, and x = 0 being ferromagnetic. The evolution of the domain structure along the magnetizati on/demagnetization process - as seen by depolarization - is strongly asymme tric, with maximum change in the domain structure only after magnetization reversal (typical domain size delta approximate to 3 mum in the virgin stat e). Near T-c, the alloy approached the behavior of FM PdFe, showing a symme tric change of domain structure on the applied field. (0 (C) 2001 Elsevier Science B.V. All rights reserved.