Low-temperature heat capacity and thermodynamic functions of dysprosium selenide Dy2Se3 Full article
Journal |
Thermochimica Acta
ISSN: 1872-762X , E-ISSN: 0040-6031 |
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Output data | Year: 2020, Volume: 686, Article number : 178551, Pages count : 5 DOI: 10.1016/j.tca.2020.178551 | ||
Tags | Heat capacity Thermodynamic functions Dysprosium selenide Schottky anomaly | ||
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Abstract:
A sample of dysprosium selenide (Dy2Se3) was synthesized and characterized by various physicochemical methods. The heat capacity of Dy2Se3 has been measured in the temperature range from T=4.85 K to T=301.11 K using adiabatic calorimetry. Two pronounced λ-anomalies with maxima at temperatures TC1=6.20 K and TC2=219.40 K were found in the functional behavior of the heat capacity. In addition, the heat capacity of Dy2Se3(cr) showed a continuing excess value consistent with a Schottky anomaly on energy levels lying roughly from 0 to 425 cm−1 above the ground state. On the basis of experimental data on the heat capacity, the values of entropy, enthalpy and reduced Gibbs energy were calculated in the interval from T=0 to T=301 K, and the anomalous contribution to these properties was determined. The value of the absolute entropy obtained was used for calculation of Dy2Se3(cr) entropy formation at T=298.15 K.
Cite:
Bespyatov M.A.
, Musikhin A.E.
, Zelenina L.N.
, Chusova T.P.
, Nikolaev R.E.
, Korolkov I.V.
Low-temperature heat capacity and thermodynamic functions of dysprosium selenide Dy2Se3
Thermochimica Acta. 2020. V.686. 178551 :1-5. DOI: 10.1016/j.tca.2020.178551 WOS OpenAlex
Low-temperature heat capacity and thermodynamic functions of dysprosium selenide Dy2Se3
Thermochimica Acta. 2020. V.686. 178551 :1-5. DOI: 10.1016/j.tca.2020.178551 WOS OpenAlex
Dates:
Submitted: | Oct 30, 2019 |
Accepted: | Feb 7, 2020 |
Published online: | Feb 19, 2020 |
Identifiers:
Web of science: | WOS:000528017000017 |
OpenAlex: | W3007469216 |
Citing:
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OpenAlex | 2 |