Home > Publications database > Magnetocaloric effect in RAl$_{2}$ (R=Nd, Sm, and Tm): Promising for cryogenic refrigeration close to liquid helium temperature > print

001     201517
005     20250129094245.0
024 7 _ |a 10.1016/j.jallcom.2012.03.076
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100 1 _ |a Patra, M.
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245 _ _ |a Magnetocaloric effect in RAl$_{2}$ (R=Nd, Sm, and Tm): Promising for cryogenic refrigeration close to liquid helium temperature
260 _ _ |a Lausanne
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520 _ _ |a NdAl2 and TmAl2 single-crystals display Curie temperature (TC) at 76.5 and 6.0 K, which are significantly close to liquid nitrogen and helium (THe) temperatures, respectively. Maximum entropy-change (−ΔSM) for 0–70 kOe are 35.9 and 8.9 J/kg-K at TC with large cooling efficiency 655 and 398 J/kg for TmAl2 and NdAl2, respectively. Adiabatic temperature change at THe for 0–20 kOe is 3.7 K for TmAl2. This is promising for cryogenic refrigeration down to sub-Kelvin temperature using an electromagnet. The −ΔSM for SmAl2 is low (∼0.5 J/kg-K at TC for 0–70 kOe). The direction-dependent anisotropy in thermal and field variations of ΔSM, and a reasonable correlation between ΔSM and magnetoresistance are realized for NdAl2 and TmAl2.
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700 1 _ |a Majumdar, S.
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700 1 _ |a Giri, S.
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700 1 _ |a Xiao, Y.
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700 1 _ |a Chatterji, T.
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773 _ _ |a 10.1016/j.jallcom.2012.03.076
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