Frequency dependence of low-temperature susceptibility peak in some titanomagnetites

Details Frequency dependence of low-temperature susceptibility peak in some titanomagnetites Frequency dependence of low-temperature susceptibility peak in some titanomagnetites

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pepi...76..131r&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 76, Issue 1-2, p. 131-135.

Physics

11

Scientific paper

Several members of the titanomagnetite (Fe3 - xTixO4 0 <= x <= 1.0) series have isotropic points (i.e. temperatures at which the first-order magnetocrystalline anisotropy constant K1 = 0), where the initial magnetic susceptibility, χ, attains a peak value. We report here the preliminary results of our study of the χ-T relationship of these materials over the frequency range 13 Hz to 117 kHz. We find that the χ peak of magnetite remains at about 120 K, whereas that of Fe2.8Ti0.2O4 shifts by 58 K over this frequency range. The features of this phenomenon are reported, and its value in distinguishing titanomagnetites is noted.

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