MAGNETIC PHASE-TRANSITIONS IN RFE(10)MO(2) COMPOUNDS

A variety of magnetic phase transitions have been observed for all the RFe(10)Mo(2) compounds from AC and DC magnetic measurements in the te mperature range between 4.2 and 300 K. The alloys with R = Nd, Tb and Dy exhibit spin reorientation transitions and with R = Ho, Er and Tm s ome unidentified magnetic phase transitions occur which are accompanie d by strong relaxation effects in the Fe-57 Mossbauer spectra of TmFe1 0Mo2. The observed magnetic transitions may be broadly interpreted in terms of a mean-field mixed-exchange model, although the detailed beha viour is somewhat different