CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Order of magnetic transition and large magnetocaloric effect in Er3Co* |
Shen Jun(沈俊)a)b)† , Zhao Jin-Liang(赵金良)b), Hu Feng-Xia(胡凤霞)b), Wu Jian-Feng(吴剑峰)a), Sun Ji-Rong(孙继荣)b), and Shen Bao-Gen(沈保根)b) |
a Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 China; b State Key Laboratory of Magnetism, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract We have studied the magnetic and magnetocaloric properties of the Er3Co compound, which undergoes ferromagnetic ordering below the Curie temperature $T_{\rm C}=13$ K. It is found by fitting the isothermal magnetization curves that the Landau model is appropriate to describe the Er3Co compound. The giant magnetocaloric effect (MCE) without hysteresis loss around $T_{\rm C}$ is found to result from the second-order ferromagnetic-to-paramagnetic transition. The maximal value of magnetic entropy change is 24.5 J/kg$\cdot$K with a refrigerant capacity (RC) value of 476 J/kg for a field change of 0--5 T. Large reversible MEC and RC indicate the potentiality of Er3Co as a candidate magnetic refrigerant at low temperatures.
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Received: 03 January 2010
Accepted manuscript online:
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PACS:
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75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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75.30.Kz
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(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
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75.60.Ej
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(Magnetization curves, hysteresis, Barkhausen and related effects)
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75.50.Cc
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(Other ferromagnetic metals and alloys)
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75.20.En
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(Metals and alloys)
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75.10.-b
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(General theory and models of magnetic ordering)
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Fund: Project supported by the National
Basic Research Program of China (Grant No.~2006CB601101), the
National Natural Science Foundation of China (Grant No.~50731007)
and the Knowledge Innovation Project of the Chinese Academy of
Sciences. |
Cite this article:
Shen Jun(沈俊), Zhao Jin-Liang(赵金良), Hu Feng-Xia(胡凤霞), Wu Jian-Feng(吴剑峰), Sun Ji-Rong(孙继荣), and Shen Bao-Gen(沈保根) Order of magnetic transition and large magnetocaloric effect in Er3Co* 2010 Chin. Phys. B 19 047502
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