摘要
较详细地介绍了美国依阿华州立大学Ames 实验室的一项重大发现。该实验室的Pecharsky和Gschneidner 两位科学家近期发现具有巨磁热效应的GdSiGe 系磁致冷材料。该系合金在30 ~300 K之间相变点可调, 且其磁熵变为对应温区已研究出的最好材料的2 ~10 倍; 在室温附近Gd5Si2Ge2 的磁热效应是至今所发现的最好室温磁致冷材料金属钆的两倍,
A giant magnetocaloric effect was discovered in the Gd 5(Si x Ge 1-x ) 4 ( x ≤0.5) alloys by Professor Pecharsky and Gschneidner of Ames Lab. For the temperature range between 30 and 300 K, the alloys exceed the reversible magnetic entropy change for any known magnetic refrigerant material by a factor 2~10. The magnetic entropy change of Gd 5Si 2Ge 2 is twice of that of Gd at the same magnetic field, which predict that the engineering application of room temperature magnetic refrigeration is promising.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1999年第A01期290-293,共4页
The Chinese Journal of Nonferrous Metals
关键词
巨磁热效应
磁致冷
磁熵变
磁致冷材料
giant magnetocaloric effect magnetic refrigeration magnetic entropy change magnetic refrigerant material