【作者】 钟喜春； 刘正义； 曾德长；

【Author】 Zhong Xichun Liu Zhengyi Zeng Dechang(Institute of Material Science and Technology, College of Mechanical Engineering, South China University of Technology,Guangzhou,510640)

【机构】 华南理工大学机械工程学院材料科学与技术研究所；

【摘要】 在氩气气氛中用熔炼法制备了Ce2Fe17-xCox系列合金,通过粉末X射线衍射和SQUID磁强计研究了样品的结构和磁熵变。结果表明,Ce2Fe17-xCox系列合金具有菱方Th2Zn17型结构,居里温度可通过离子替代而改变,Ce2Fe17-xCox合金有较大的磁熵变,且致冷温区较宽,是一类有可供选择的室温磁致冷材料。更多还原

【Abstract】 A series of Ce2Fe17-xCox alloys were prepared by arc melting under purified argon atmosphere. By means of X-ray diffraction pattern and SQUID magnetometer, structure and magnetic entropy changes in Ce2Fe17-xCox alloys were investigated. The results show that, the crystal structure is Th2Zn17-type rhombohedral for Ce2Fe17-xCox alloys; the Curie temperature of Ce2Fe17-xCox alloys can be shifted to room temperature around by a small adjustment of composition. Magnetic entropy changes ( - △SM ) near Curie temperature are relatively large in a comparatively wide range of temperature for Ce2Fe17-xCox alloys. Ce2Fe17-xCox alloys are provided with alternative materials for room-temperature magnetic refrigeration.更多还原