Large magnetic entropy change and refrigerant capacity in rare-earth intermetallic RCuAl (R=Ho and Er) compounds |
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| Authors: | QY Dong J Chen J Shen JR Sun BG Shen |
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| Institution: | 1. Department of Physics, Capital Normal University, Beijing 100048, People''s Republic of China;2. State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People''s Republic of China;3. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People''s Republic of China |
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| Abstract: | The magnetic properties and the magnetocaloric effects of RCuAl (R=Ho and Er) compounds have been investigated. Both HoCuAl and ErCuAl just undergo a second-order ferromagnetic–paramagnetic phase transition at TC. Large reversible magnetic entropy changes (ΔSM) are observed around their respective Curie temperatures due to the ferromagnetic–paramagnetic phase transition. For a field change of 0–5 T, the peak values of −ΔSM of RCuAl (R=Ho and Er) compounds are 23.9 and 22.9 J kg−1 K−1 at TC, with the values of refrigerant capacity of 393 and 321 J kg−1, respectively. These properties suggest that RCuAl (R=Ho and Er) compounds could be considered as attractive magnetic refrigerants working in low temperature range. |
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| Keywords: | ZrNiAl type Magnetic entropy change |
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