Specific heat and thermal expansion of La1-xEuxCoO3

被引：3
作者：
Thakur, Rasna [1 ]
Thakur, Rajesh K. [1 ]
Gaur, N. K. [1 ]
机构：
[1] Barkatullah Univ, Dept Phys, Bhopal 462026, India
来源：
PHYSICA SCRIPTA | 2012年 / 86卷 / 03期
关键词：
SPIN-STATE TRANSITIONS; CRYSTALS; LACOO3;
D O I：
10.1088/0031-8949/86/03/035601
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated the specific heat and thermal expansion of La1-xEuxCoO3 (0.0 <= x <= 1.0) perovskite using a modified rigid ion model for the temperature range 1K <= T <= 1000 K. The trends of variation in our computed specific heats and thermal expansion are in good agreement with corresponding experimental data for almost all the compositions (x). The specific heat is found to increase with temperature from 15 to 300 K, while it decreases with concentration (x) for these perovskite cobaltates. In addition, the results on the temperature dependence of the molecular force constant (f), Reststrahlen frequency (v), cohesive energy (phi) and Debye temperature (theta(D)) are also discussed.
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页数：6
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