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科学通报  2011 

Er-Al-Co块体非晶合金的磁热效应

, PP. 2812-2818

Keywords: Er-Al-Co,块体非晶合金,磁热效应,居里温度,致冷能力

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Abstract:

利用水冷铜模铸造法制备了一系列不同成分的Er-Al-Co三元块体非晶合金,研究了该系列合金的非晶形成能力和磁热效应.结果表明,在磁场诱发下,该系列非晶合金在9K左右发生了顺磁-铁磁性二级磁性转变.由于具有较高的有效磁子数,该系列非晶合金具有优异的磁热效应,其中Er56Al24Co20非晶合金最大磁熵变和磁致冷能力分别为16.06Jkg-1K-1和465.7Jkg-1,是氢液化区有竞争力的磁致冷候选材料.

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