NMR spectra of57Fe in hexagonal ferrites with magnetoplumbite structure |
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| Authors: | H. Štěpánková J. Englich P. Novák B. Sedlák M. Pfeffer |
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| Affiliation: | (1) Faculty of Mathematics and Physics, Charles University, Prague, Czechoslovakia;(2) Institute of Physics, Czech. Acad. Sci., Prague, Czechoslovakia |
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| Abstract: | The NMR spectra of57Fe in domains of MFe12O19 (M=Ba, Sr, Pb) were measured by spin echo technique at 4.2 K. The change of the heavy ion causes frequency shifts of lines corresponding to Fe3+ ions in 2b and 4f2 sites while leaving other lines essentially unchanged; the significant role of different Fe3+−M2+ bonding was found. The dipolar broadening of lines in BaFe12O19 caused by random and static displacement of bipyramidal Fe3+ ions from the mirror plane is calculated and the results are compared with the experiment. |
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