Excellent Magnetocaloric Effect in Er60Al18Co22 Bulk Metallic Glass

Excellent magnetocaloric effect with a maximum entropy change and refrigeration capacity of 17.6 J·kg^-1·K^-1 and 546 J·kg^-1, respectively, has been discovered in the Er60Al18Co22 bulk metallic glass under the field of 50 kOe in the temperature range of helium liquefaction. This MCE results from th...

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Bibliographic Details
Published in:Chinese physics letters 2010-11, Vol.27 (11), p.173-176
Main Author: 惠希东 许志一 王恩睿 陈国良 吕昭平
Format: Article
Language:English
Subjects:
MCE
制冷能力
大块金属玻璃
平均场理论
氦液化
温度范围
玻璃结构
磁热效应
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Summary:Excellent magnetocaloric effect with a maximum entropy change and refrigeration capacity of 17.6 J·kg^-1·K^-1 and 546 J·kg^-1, respectively, has been discovered in the Er60Al18Co22 bulk metallic glass under the field of 50 kOe in the temperature range of helium liquefaction. This MCE results from the second-order magnetic transition from the paramagnetic to the ferromagnetic state. Our analysis based on mean-field theory suggests that the excellent MCE is attributed to the strong exchange of magnetic moment in the glassy structure.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/27/11/117502