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Low-temperature heat capacity of magnesioferrite, MgFe2O4

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Abstract

Heat capacity of stoichiometric homogeneous spinel MgFe2O4 was measured from 5 to 305 K and thermodynamic functions were derived for temperatures up to 725 K using our previous high-temperature experimental data for the same sample.

Anomaly in C p was found at very low temperatures. Experimental data below 20 K contain large (up to 25% near 5 K) error arising from the difference in the thermal history between the experimental series.

Magnetic contribution to the low-temperature heat capacity was tested, and the linear function was found to fit experimental data better than the three-halves power derived from the spin-wave theory.

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Authors and Affiliations

  1. Institute of Geology and Mineralogy SB RAS, Pr. Ak. Koptyuga, 3, Novosibirsk, 630090, Russia

    A. I. Turkin & V. A. Drebushchak

  2. Institute of Inorganic Chemistry SB RAS, Pr. Ak. Lavrentieva, 3, Novosibirsk, 630090, Russia

    V. A. Drebushchak, Yulia A. Kovalevskaya & I. E. Paukov

  3. Novosibirsk State University, Ul. Pirogova 2, Novosibirsk, 630090, Russia

    V. A. Drebushchak

Authors
  1. A. I. Turkin
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  2. V. A. Drebushchak
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  3. Yulia A. Kovalevskaya
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  4. I. E. Paukov
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Correspondence to V. A. Drebushchak.

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Turkin, A.I., Drebushchak, V.A., Kovalevskaya, Y.A. et al. Low-temperature heat capacity of magnesioferrite, MgFe2O4 . J Therm Anal Calorim 92, 717–721 (2008). https://doi.org/10.1007/s10973-008-9025-z

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  • DOI: https://doi.org/10.1007/s10973-008-9025-z

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