Heat capacity and thermodynamic functions of new nanostructured cuprate-manganite NdCa2CuMnO6
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- 作者：Sh. B. Kasenova ; B. K. Kasenov…
- 关键词：cuprate ; manganite ; heat capacity ; thermodynamic functions
- 刊名：Russian Journal of Physical Chemistry A, Focus on Chemistry
- 出版年：2014
- 出版时间：October 2014
- 年：2014
- 卷：88
- 期：10
- 页码：1802-1805
- 全文大小：398 KB
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- 作者单位：Sh. B. Kasenova (1) <br> B. K. Kasenov (1) <br> Zh. I. Sagintaeva (1) <br> N. S. Bekturganov (2) <br> K. T. Ermaganbetov (3) <br> E. E. Kuanyshbekov (1) <br> A. A. Seisenova (1) <br> D. I. Smagulova (1) <br><br>1. Abishev Institute of Chemistry and Metallurgy, Karaganda, 100009, Kazakhstan <br> 2. National Scientific and Technological Holding JSC Parasat, Astana, 010000, Kazakhstan <br> 3. Karaganda Buketov State University, Karaganda, 470074, Kazakhstan <br>
- ISSN：1531-863X
文摘
Heat capacities of nanostructured NdCa2b>CuMnO6b> cuprate-manganite are measured by means of dynamic calorimetry on an IT-C-400 unit in the temperature interval of 298.15-73 K. It is established that a λ-shaped phase transition of the second kind is revealed at 348 K on the curve of the dependence C° p b> ?f(T) of NdCa2b>CuMnO6b>. Equations for the temperature dependence of the heat capacity of NdCa2b>CuMnO6b> cuprate-manganite are derived from experimental data including the temperature of phase transition. Thermodynamic functions H°(T)-H°(298.15), S°(T), and Φ**(T) are calculated in the interval of 298.15-75 K.