Features of magnetocaloric effect in rare-earth based R(Co-Fe)2 laves phases, with R = Ho, Er.
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资源简介：
In this paper measurement results of heat capacity (CP) and magnetocaloric effect (MCE) in Ho(Co1-хFeх)2 and Er(Co1-хFeх)2 systems over the whole range of Co substitution by Fe are presented. Phase composition was controlled by X-ray diffraction analysis. Heat capacity was measured in the temperature range 77-320 K. MCE has been studied within the temperature range 5-670 K in magnetic fields up to 70 kOe. It was found that Fe concentration increase causes the following: the CP maxima disappearing at urie temperature point and emergence of magnetic contribution to CP in a wide temperature range lower this point; a table-like (plateau) MCE temperature dependence for both magnetic entropy change date (ΔS) and direct ΔT-effect measurements independent on Fe concentration. The possible reasons of such behavior are discussed.
提供机构：
International Institute of Refrigeration (IIR)
创建时间：
2016-12-28
