Magnetocaloric effect of (Gd1-xCex)Co2 compounds in low magnetic fields
来源期刊：Rare Metals2009年第5期
论文作者：CHEN Xianga, b, ZHUANG Yinghongb, FANG Feia, and YAN Jialinb a Department of Physics and Electronic Informational Engineering, Neijiang Teachers College, Neijiang , China b Key laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning , China
文章页码：487 - 490
摘 要：The phases in the compounds （Gd1-xCex）Co2 with x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5 were investigated by X-ray diffraction, and the magnetocaloric effect for x = 0-0.4 was studied by magnetization measurements. The samples are almost single phase with a cubic MgCu2-type structure for x = 0-0.5. The magnetization decreases with an increase in Ce content. There is almost no magnetic transition for x = 0.5 at 100-350 K. The Curie temperature （Tc） of the （Gd1-xCex）Co2 compounds with x from 0.1 to 0.4 are 350, 344, 340, and 338 K respectively. The maximum magnetic entropy change is 2.34 J·kg-1·K-1 when x = 0.3. The results of Arrott plots show that the magnetic phase transition is second-order magnetic phase transition in these compounds.
CHEN Xianga, b, ZHUANG Yinghongb, FANG Feia, and YAN Jialinb a Department of Physics and Electronic Informational Engineering, Neijiang Teachers College, Neijiang 641002, China b Key laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning 530004, China
摘 要：The phases in the compounds （Gd1-xCex）Co2 with x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5 were investigated by X-ray diffraction, and the magnetocaloric effect for x = 0-0.4 was studied by magnetization measurements. The samples are almost single phase with a cubic MgCu2-type structure for x = 0-0.5. The magnetization decreases with an increase in Ce content. There is almost no magnetic transition for x = 0.5 at 100-350 K. The Curie temperature （Tc） of the （Gd1-xCex）Co2 compounds with x from 0.1 to 0.4 are 350, 344, 340, and 338 K respectively. The maximum magnetic entropy change is 2.34 J·kg-1·K-1 when x = 0.3. The results of Arrott plots show that the magnetic phase transition is second-order magnetic phase transition in these compounds.
关键词：
