Low-Temperature Heat Capacity and Thermal Behavior
of Zn_0.98Co_0.02O in the High-Temperature Region

K. S. Gavrichev^a, A. V. Tyurin^a, M. A. Ryumin^a, A. V. Khoroshilov^a, G. D. Nipan^a,
V. A. Ketsko^a, T. N. Kol’tsova^a, I. Yu. Pinus^a, G. A. Buzanov^b, and N. A. Votinova^b

^a Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

^b Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 119992 Russia
E-mail: gavrich@igic.ras.ru

Received December 14, 2007

Abstract—The low-temperature heat capacity of Zn_0.98Co_0.02O oxide was measured by adiabatic calorimetry.
The formation of a solid solution was shown to be accompanied by a change in the entropy by 0.4 J/(K mol).
No anomalies in the heat capacity or the thermal behavior confirming the phase transformations found earlier
by other methods were observed. A heat capacity anomaly was revealed below 15 K and tentatively attributed
to a change in the magnetic properties of the substance.

DOI: 10.1134/S003602360901001X

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