Heat capacity and magnetocaloric properties of La1-x K x MnO3 manganites

被引：19
|
作者：
Kamilov, I. K. [1 ]
Gamzatov, A. G. [1 ]
Batdalov, A. B. [1 ]
Mankevich, A. S. [2 ]
Korsakov, I. E. [2 ]
机构：
[1] Russian Acad Sci, Dagestan Sci Ctr, Amirkhanov Inst Phys, Makhachkala 367003, Dagestan, Russia
[2] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
来源：
PHYSICS OF THE SOLID STATE | 2010年 / 52卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
Heat Capacity; Manganite; Magnetocaloric Effect; Crystal Lattice Parameter; Relative Cool Power;
D O I：
10.1134/S1063783410040190
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The magnetocaloric effect and the heat capacity of La1 - x K (x) MnO3 (x = 0.1, 0.15, 0.175) ceramic samples have been studied at temperatures in the range 77-350 K and in magnetic fields of up to 27 kOe. The technique for preparing the samples has been described. The heat capacity anomalies related to the ferromagnetic-paramagnetic magnetic phase transition have been revealed and interpreted. It has been demonstrated that the change in the magnetic entropy Delta S calculated from the data on the heat capacity C (p) and direct measurements of the magnetocaloric effect Delta T reaches values that are of practical interest.
引用
收藏
页码：789 / 793
页数：5
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