Materials for Regenerative Magnetic Cooling Spanning 20K to 80K
作者： C. B. Zimm , E. M. Ludeman , M. C. Severson , T. A. Henning
DOI: 10.1007/978-1-4615-3368-9_15
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摘要: Medium to high power cryocoolers based on the active magnetic regenerative concept (AMR) are under development for hydrogen liquefaction. Refrigeration performance is dependent temperature dependence of adiabatic change upon application a field (ΔTs). We report measurements ΔTs and heat capacity, CB, ferromagnetic materials GdPd, GdNi, GdNi2, (Er0.86. Gd0.14)Al2. The binary compounds have sharp ordering transitions encompassing all available entropy, whereas ternary with two rare earths shows broadened transition. GdNi2 GdPd properties well suited use in AMR stages operating from 80 K 40 20 K, respectively.
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