【摘 要】
：
Magnetocaloric effect (MCE) technology is well known for its wide applications in ultra-low temperature range andpotential application at room temperature [1].
【机 构】
：
StateKeyLaboratoryforMagnetism,InstituteofPhysics,ChineseAcademyofSciences,Beijing100190,China
【出 处】
：
第三届全国磁热效应材料和磁制冷技术学术研讨会
论文部分内容阅读
Magnetocaloric effect (MCE) technology is well known for its wide applications in ultra-low temperature range andpotential application at room temperature [1]. We investigate magnetic properties and magnetocaloric effects (MCEs) ofR2CoGa3 (R=Gd, Dy and Ho) compounds. It is found that all the compounds are ferromagnetic and have Curie temperaturesof TC=50, 17 and 10 K for R=Gd, Dy and Ho, respectively. The R2CoGa3 have large magnetic entropy change (ΔS) that arisefrom the second-order ferromagnetic-to-paramagnetic phase transition. The maximum values of ΔS are found to be –12.6,–10.8 and –13.8 J/kg K with refrigerant capacity (RC) values of 382, 252 and 287 J/kg for a magnetic field change of 0-50kOe, respectively. The large ΔS values with little or no hysteresis losses as well as wide working temperature spans implythat the R2CoGa3 compounds may serve as promising candidates for magnetic refrigeration.
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