Metamagnetic transition and magnetocaloric effect in antiferromagnetic TbPdAl compound |
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| Authors: | Jun Shen Zhi-Yi XuHu Zhang Xin-Qi ZhengJian-Feng Wu Feng-Xia HuJi-Rong Sun Bao-gen Shen |
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| Institution: | a Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People''s Republic of China
b State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People''s Republic of China |
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| Abstract: | Magnetic properties and the magnetocaloric effect of the compound TbPdAl are investigated. The compound exhibits a weak antiferromagnetic (AFM) coupling, and undergoes two successive AFM transitions at TN=43 K and Tt=22 K. A field-induced metamagnetic transition from AFM to ferromagnetic (FM) state is observed below TN, and a small magnetic field can destroy the AFM structure of TbPdAl, inducing an FM-like state. The maximal value of magnetic entropy change is −11.4 J/kg K with a refrigerant capacity of 350 J/kg around TN for a field change of 0-5 T. Good magnetocaloric properties of TbPdAl result from the high saturation magnetization caused by the field-induced AFM-FM transition. |
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| Keywords: | Magnetocaloric effect Magnetic entropy change Metamagnetic transition |
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