Magnetic properties and magnetocaloric effect in compound PrFe12B6

doi:10.1088/1674-1056/19/6/067501

Abstract Magnetic properties and magnetocaloric effect of compound PrFe₁₂B₆ are investigated. The coexistence of hard phase PrFe₁₂B₆ and soft phase $\alpha$--Fe causes interesting phenomena on the curves for the temperature dependence of magnetization. PrFe₁₂B₆ experiences a first order phase transition at the Curie temperature 200 K, accompanied by an obvious lattice contraction, which in turn results in a large magnetic entropy change. The Maxwell relation fails to give the correct information about magnetic entropy change due to the first order phase transition nature. The large magnetic entropy changes of PrFe_12.3B_4.7 obtained from heat capacity method are 11.7 and 16.2 J/kg.K for magnetic field changes of 0--2 T and 0--5 T respectively.

Keywords: magnetic properties magnetic entropy change first order phase transition

Received: 12 October 2009
Accepted manuscript online:

PACS:	75.30.Sg	(Magnetocaloric effect, magnetic cooling)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	75.30.Kz	(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
	75.40.Cx	(Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))
	65.40.Ba	(Heat capacity)
	65.40.G-	(Other thermodynamical quantities)

Fund: Project supported by the Scientific Research Foundation for Bringing Talents of Tianjin University of Science and Technology, China (Grant No.~20090426), the National Natural Science Foundation of China (Grant Nos.~50571112 and 50731007), the National Bas

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Wang Fang(王芳), Shen Bao-Gen(沈保根), Zhang Jian(张健), Sun Ji-Rong(孙继荣), Meng Fan-Bin(孟凡斌), and Li Yang-Xian(李养贤) Magnetic properties and magnetocaloric effect in compound PrFe₁₂B₆ 2010 Chin. Phys. B 19 067501

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Magnetic properties and magnetocaloric effect in compound PrFe₁₂B₆