Abstract
Low-temperature specific heat of Er-based metallic glassy composites is investigated. It is found that the low-temperature specific heat of the alloys compares favorably with that of prototype crystalline Er3Ni which is the low temperature (<15K) cryocooler regenerator material. The Er-based glassy alloys also have wide temperature range for the large low-temperature specific heat, large magnetic entropy, and the peak of the low-temperature specific heat is tunable. The alloys combining excellent mechanical properties and tunable composition make them a potential regenerator material for small scale low-temperature cryocooler.
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