FE-57 AND SN-119 MOSSBAUER INVESTIGATIONS ON SOME SUBSTITUTED BARIUM HEXAFERRITES

Fe-57 and Sn-119 Mossbauer measurements have been carried out on powde r samples of three differently substituted M-type barium hexaferrites. By Fe-57 Mossbauer measurements in an external magnetic field applied parallel to the gamma-ray direction, we found a canted spin structure for all samples. Furthermore, we detected a strong preference of the Sn4+ ions for the 4f(2) sites. From Fe-57 Mossbauer measurements above T-N we conclude that the substitution does not influence the 2b sites . The analysis of the magnetically split Sn-119 Mossbauer spectra at r oom temperature in the case of the Co-Sn and Zn-Sn substituted samples shows a strong difference between the two. The spectra were interpret ed due to the different surroundings of the Sn4+ ions.