Order of magnetic transition and large magnetocaloric effect in Er3Co*

doi:10.1088/1674-1056/19/4/047502

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.

Keywords: Er₃Co compound magnetocaloric effect magnetic transition

Received: 03 January 2010
Accepted manuscript online:

PACS:	75.30.Sg	(Magnetocaloric effect, magnetic cooling)
	75.30.Kz	(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	75.50.Cc	(Other ferromagnetic metals and alloys)
	75.20.En	(Metals and alloys)
	75.10.-b	(General theory and models of magnetic ordering)

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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Order of magnetic transition and large magnetocaloric effect in Er3Co*

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Order of magnetic transition and large magnetocaloric effect in Er₃Co*