Magnetism of sigma-phase Fe-Mo alloys: its revealing and   characterization
  A low-temperature magnetism was revealed in a series of sigma-Fe(100-x)Mo(x) alloys (x=45-53). Its characterization has been done using vibrating sample magnetometry, M\"ossbauer spectroscopy, and ac magnetic susceptibility. The magnetic ordering temperature was determined to lie in the range of 46 K for x=45 and 22K for x=53, and the ground magnetic state was found to be typical of a spin-glass. 
J. Cieslak, S. M. Dubiel, M. Reissner
cond-mat.str-el cond-mat.mtrl-sci