Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 92: Issue 3
Low-temperature heat capacity of magnesioferrite, MgFe2O4
Authors:
A. Turkin Institute of Geology and Mineralogy SB RAS Pr. Ak. Koptyuga, 3 Novosibirsk 630090 Russia

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,
V. Drebushchak

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

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

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Pages:
717–721
Online Publication Date:
02 Jul 2008
Publication Date:
01 Jun 2008
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-008-9025-z
Keywords:
heat capacity; magnetic contribution; MgFe2O4; phase transition; spinel
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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 Cp 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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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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