【摘要】 通过电弧熔炼结合放电等离子烧结技术制备了系列样品(Er_2.5Gd_0.5Co)_x（Er₂GdCo）_1-x（x=0.1、0.2、0.3）。研究发现，系列样品均发生顺磁到反铁磁、反铁磁到铁磁的连续磁相变。在0 T～5 T外加变化磁场下，合金的最大磁熵变-ΔS_M分别为10.8 Jkg^-1K^-1（x=0.1）、10.1 Jkg^-1K^-1（x=0.2）、9.3 Jkg^-1K^-1（x=0.3），对应的RC值分别为556.7 Jkg^-1、524.9 Jkg^-1、566.7 Jkg^-1。在合金(Er_2.5Gd_0.5Co)_0.3（Er₂GdCo）_0.7中观察到了从35 K到55 K的近似平台的“桌面型”磁熵变曲线，该合金适用于埃里克森磁制冷循环。更多还原

【Abstract】 The alloys (Er_2.5Gd_0.5Co)_x（Er₂GdCo）_1-x（x=0.1,0.2,0.3） were obtained by arc-melting followed by SPS technology.It is found that two successive magnetic phase transitions,namely,paramagneticantiferromagnetic transition and antiferromagnetic-ferromagnetic transition occured in all samples.For a field change of 0 T-5 T,the maximum magnetic entropy changes were determined to be 10.8 Jkg^-1K^-1 for x=0.1,10.1 Jkg^-1K^-1 for x=0.2,9.3 Jkg^-1K^-1 for x=0.3,respectively,and the corresponding RC values are 556.7Jkg^-1,524.9 Jkg^-1 and 566.7 Jkg^-1.A"table-like"magnetic entropy change curve from 35 K to 55 K was observed in the (Er_2.5Gd_0.5Co)_0.3（Er₂GdCo）_0.7 alloy,which is suitable for the Erickson magnetic refrigeration cycle.更多还原