Magnetic entropy change and large refrigerant capacity of Ce6i2Si3-type GdCoSiGe compound

doi:10.1088/1674-1056/20/2/027501

Abstract Magnetic entropy change (

Δ S_{M})

and refrigerant capacity (

R C

) of Ce

_{6}

Ni

_{2}

Si

_{3}

-type Gd

_{6}

Co

_{1.67}

Si

_{2.5}

Ge

_{0.5}

compounds have been investigated. The Gd

_{6}

Co

_{1.67}

Si

_{2.5}

Ge

_{0.5}

undergoes a reversible second-order phase transition at the Curie temperature

T_{C} = 296

K. The high saturation magnetization leads to a large

Δ S_{M}

and the maximal value of

Δ S_{M}

is found to be 5.9 J/kg

\cdot

K around

T_{C}

for a field change of 0--5 T. A broad distribution of the

Δ S_{M}

peak is observed and the full width at half maximum of the

Δ S_{M}

peak is about 101~K under a magnetic field of 5 T. The large

R C

is found around

T_{C}

and its value is 424 J/kg.

Keywords: Gd₆Co_1.67Si_2.5Ge_0.5 compound magnetocaloric effect refrigerant capacity

Received: 18 August 2010
Revised: 28 September 2010
Accepted manuscript online:

PACS:	75.30.Sg	(Magnetocaloric effect, magnetic cooling)
	75.50.Cc	(Other ferromagnetic metals and alloys)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11004204 and 51001114), the Knowledge Innovation Project of the Chinese Academy of Sciences, and the National Basic Research Program of China (Grant No. 2006CB601101).

Cite this article:

Shen Jun(沈俊), Zhang Hu(张虎), and Wu Jian-Feng(吴剑峰) Magnetic entropy change and large refrigerant capacity of Ce₆i₂Si₃-type GdCoSiGe compound 2011 Chin. Phys. B 20 027501

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Magnetic entropy change and large refrigerant capacity of Ce6i2Si3-type GdCoSiGe compound

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Magnetic entropy change and large refrigerant capacity of Ce₆i₂Si₃-type GdCoSiGe compound