MAGNETISM OF DYMN2 AND HOMN2 - FE-57 AND SN-119 MOSSBAUER STUDIES

Mossbauer spectra were measured for two Laves phase compounds DyMn2 an d HoMn2 in which manganese was substituted to 0.5% with Fe-57 and to 0 .2% with Sn-119. At 4.2 K the Fe-57 and Sn-119 spectra of the Dy compo und were unambiguously fitted each with two Zeeman patterns (with rela tive contributions to the spectra 3:1) corresponding to two different Mn sites - magnetic and nonmagnetic. Transferred hyperfine fields at S n-119 were found to be proportional to the magnetic moment of Dy and i ts ferromagnetic component, corroborating the magnetic structure found in neutron diffraction (ND) experiment. The same procedure was carrie d on with the spectra measured for the Ho compound, but the above ment ioned proportionality was not found.