Thermodynamic and Electrophysical Properties of Nanosized LaMeFeCrMnO6.5 (Me = Li, Na, K) Ferro-Chromo-Manganites

Bulat Kunurovich Kasenov, Zhenisgul Imangalievna Sagintaeva, К. Т. Ермаганбетов, К. С. Какенов, G. A. Esenbaeva

2018

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DOI 10.1134/s0036024418040118
Data confidence 70 medium
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Abstract

Ferro-chromo-manganites with compositions LaMeFeCrMnO 6.5 (Me = Li, Na, K) are synthesized via ceramic technology from La 2 O 3 (special purity grade), Fe 2 O 3 , Cr 2 O 3 , Mn 2 O 3 , and carbonates of alkali metals (analytical grade). The individuality of the resulting compounds is confirmed via X-ray phase analysis. The heat capacity of nanosized LaMeFeCrMnO 6.5 (Me = Li, Na, K) ferro-chromo-manganites is measured via dynamic calorimetry in the temperature interval of 298.15–673 K on an IT-S-400 apparatus. The values of C ° p ( T ) and thermodynamic functions H °( T )– H °(298.15), S °( T ), and Φ xx ( T ) are calculated. The temperature dependences of the electrical capacity ( C ), dielectric permeability (ε) and electrical resistivity ( R ) studied in the temperature range of 293–483 K show that these materials are also of interest for microelectronics.