Magnetocaloric properties of La0.9Pr0.1Fe11.2Co0.7Si1.1compound through direct measurements under cyclic magnetic fields up to 30 Hz

被引：9
作者：
Aliev, A. M. [1 ]
Gamzatov, A. G. [1 ]
Abdulkadirova, N. Z. [1 ]
Gebara, P. [2 ]
机构：
[1] Russian Acad Sci, Amirkhanov Inst Phys, Dagestan Fed Res Ctr, Makhachkala 367015, Russia
[2] Czestochowa Tech Univ, Dept Phys, Armii Krajowej 19, PL-42200 Czestochowa, Poland
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION | 2023年 / 151卷
关键词：
Magnetocaloric effect; Cyclic magnetic fields; Degradation; Frequency dependence; Relative cooling power; PARTIAL SUBSTITUTION; LA(FEXSI1-X)(13); TRANSITION; EXPANSION; PR; MN; FE;
D O I：
10.1016/j.ijrefrig.2023.04.003
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Direct measurements of the adiabatic temperature change (Delta Tad) in cyclic magnetic fields with a frequency of up to 30 Hz in the La0.9Pr0.1Fe11.2Co0.7Si1.1 alloy were carried out. For this alloy, the magnetocaloric effect (MCE) under magnetic field change of 1.8 T is 2.8 K and the temperature hysteresis does not exceed 0.5 K. Under magnetic field change of 0.62 T with frequencies of up to 20 Hz, the MCE shows a weak frequency dependence (less than 5%), while under magnetic field change of 1.2 T the frequency dependence is clear pronounced. Long-term exposure to a low frequency cyclic magnetic field does not result in a change in the MCE value, while at frequencies more than 10 Hz noticeable degradation of the MCE is observed. The results of the study show that the upper limit of the operation of magnetic refrigerators can reach several tens of Hz.
引用
收藏
页码：146 / 151
页数：6
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