G. Albanese et al., MOSSBAUER AND MAGNETIC STUDIES OF PBFE12-XCRXO19 HEXAGONAL FERRITES, Journal of magnetism and magnetic materials, 184(3), 1998, pp. 337-343
Mossbauer and magnetic measurements have been performed on Cr substitu
ted Pb-hexaferrite of composition PbFe12-xCrxO19 (0 less than or equal
to x less than or equal to 6). The main hyperfine parameters for the
Fe3+ nuclei of the various sublattices have been determined in the tem
perature range of 78-800 K. The data obtained give no evidence of devi
ation of the Fe3+ magnetic moments from the axial magnetic order. In a
ddition, the Cr3+ ions do not occupy the hexahedral lattice sites. The
rapid fall of the saturation magnetisation with increasing x cannot b
e simply explained with the replacement of the magnetic moment of the
Fe3+ with that of Cr3+. The onset of a complex magnetic order induced
by the presence of Cr3+ ions is involved. (C) 1998 Elsevier Science B.
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