Phase structure and magnetocaloric effect of (Tb1–xDyx)Co2 alloys
来源期刊：Journal of Rare Earths2008年第5期
论文作者：庄应烘 陈湘 周开文 李克峰 马春华
文章页码：749 - 752
摘 要：Phase structure and magnetocaloric effect of （Tb1–xDyx）Co2 alloys with x=0, 0.2, 0.4, 0.6, 0.8, and 1.0 were investigated using X-ray diffraction analysis, differential thermal analysis, and magnetization measurement. The samples were single phase with cubic MgCu2- type structure; with the increase of Dy content, TC decreased from 240 K （TbCo2） to 130 K （DyCo2）, and the maximum magnetic entropy change |?SM,max| increased from 3.133 to 8.176 J/kg·K under low magnetic field of 0–2 T. The Arrott plot and the change of |?SM,max| showed that magnetic phase transition from second order to first order occured with the increase of Dy content between x=0.6 and 0.8.
庄应烘，陈湘，周开文，李克峰，马春华
摘 要：Phase structure and magnetocaloric effect of （Tb1–xDyx）Co2 alloys with x=0, 0.2, 0.4, 0.6, 0.8, and 1.0 were investigated using X-ray diffraction analysis, differential thermal analysis, and magnetization measurement. The samples were single phase with cubic MgCu2- type structure; with the increase of Dy content, TC decreased from 240 K （TbCo2） to 130 K （DyCo2）, and the maximum magnetic entropy change |?SM,max| increased from 3.133 to 8.176 J/kg·K under low magnetic field of 0–2 T. The Arrott plot and the change of |?SM,max| showed that magnetic phase transition from second order to first order occured with the increase of Dy content between x=0.6 and 0.8.
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