The hydrogen absorption properties and magnetocaloric effect of La 0.8Ce0.2(Fe1-xMnx) 11.5Si1.5Hy

Chaolun Wang; Yi Long; Tao Ma; Bin Fu; Rongchang Ye; Yongqin Chang; Fengxia Hu; Jun Shen

doi:10.1063/1.3549560

The hydrogen absorption properties and magnetocaloric effect of La _0.8Ce_0.2(Fe_1-xMn_x) _11.5Si_1.5H_y

Chaolun Wang, Yi Long^*, Tao Ma, Bin Fu, Rongchang Ye, Yongqin Chang, Fengxia Hu, Jun Shen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

The effect of hydrogenating process on the homogeneity of hydrogen absorption in the La_0.8Ce_0.2 (Fe_1-xMn _x)_11.5Si_1.5 compounds was investigated. It is attractive that the distribution of hydrogen atoms in the compounds becomes more uniform with increasing hydrogen pressure and annealing temperature. Homogeneous hydrides of La_0.8Ce_0.2(Fe _0.985Mn_0.015)_11.5Si_1.5 were obtained by annealing them at the temperature of 773 K and under the hydrogen atmosphere of 0.5 MPa. With changes of Mn content, the Curie temperatures (T_C) of the hydrides of La_0.8Ce_0.2 (Fe_1-xMn _x)_11.5Si_1.5 can be adjusted in the room temperature range from 279 to 312 K. Large magnetic entropy changes due to the itinerant-electron metamagnetic transition are obtained in the room temperature range for the hydrides of La_0.8Ce_0.2(Fe _1-xMn_x)_11.5Si_1.5.

Original language	English
Article number	07A910
Journal	Journal of Applied Physics
Volume	109
Issue number	7
DOIs	https://doi.org/10.1063/1.3549560
Publication status	Published - 1 Apr 2011
Externally published	Yes

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title = "The hydrogen absorption properties and magnetocaloric effect of La 0.8Ce0.2(Fe1-xMnx) 11.5Si1.5Hy",

abstract = "The effect of hydrogenating process on the homogeneity of hydrogen absorption in the La0.8Ce0.2 (Fe1-xMn x)11.5Si1.5 compounds was investigated. It is attractive that the distribution of hydrogen atoms in the compounds becomes more uniform with increasing hydrogen pressure and annealing temperature. Homogeneous hydrides of La0.8Ce0.2(Fe 0.985Mn0.015)11.5Si1.5 were obtained by annealing them at the temperature of 773 K and under the hydrogen atmosphere of 0.5 MPa. With changes of Mn content, the Curie temperatures (TC) of the hydrides of La0.8Ce0.2 (Fe1-xMn x)11.5Si1.5 can be adjusted in the room temperature range from 279 to 312 K. Large magnetic entropy changes due to the itinerant-electron metamagnetic transition are obtained in the room temperature range for the hydrides of La0.8Ce0.2(Fe 1-xMnx)11.5Si1.5.",

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T1 - The hydrogen absorption properties and magnetocaloric effect of La 0.8Ce0.2(Fe1-xMnx) 11.5Si1.5Hy

AU - Wang, Chaolun

AU - Long, Yi

AU - Ma, Tao

AU - Fu, Bin

AU - Ye, Rongchang

AU - Chang, Yongqin

AU - Hu, Fengxia

AU - Shen, Jun

PY - 2011/4/1

Y1 - 2011/4/1

N2 - The effect of hydrogenating process on the homogeneity of hydrogen absorption in the La0.8Ce0.2 (Fe1-xMn x)11.5Si1.5 compounds was investigated. It is attractive that the distribution of hydrogen atoms in the compounds becomes more uniform with increasing hydrogen pressure and annealing temperature. Homogeneous hydrides of La0.8Ce0.2(Fe 0.985Mn0.015)11.5Si1.5 were obtained by annealing them at the temperature of 773 K and under the hydrogen atmosphere of 0.5 MPa. With changes of Mn content, the Curie temperatures (TC) of the hydrides of La0.8Ce0.2 (Fe1-xMn x)11.5Si1.5 can be adjusted in the room temperature range from 279 to 312 K. Large magnetic entropy changes due to the itinerant-electron metamagnetic transition are obtained in the room temperature range for the hydrides of La0.8Ce0.2(Fe 1-xMnx)11.5Si1.5.

AB - The effect of hydrogenating process on the homogeneity of hydrogen absorption in the La0.8Ce0.2 (Fe1-xMn x)11.5Si1.5 compounds was investigated. It is attractive that the distribution of hydrogen atoms in the compounds becomes more uniform with increasing hydrogen pressure and annealing temperature. Homogeneous hydrides of La0.8Ce0.2(Fe 0.985Mn0.015)11.5Si1.5 were obtained by annealing them at the temperature of 773 K and under the hydrogen atmosphere of 0.5 MPa. With changes of Mn content, the Curie temperatures (TC) of the hydrides of La0.8Ce0.2 (Fe1-xMn x)11.5Si1.5 can be adjusted in the room temperature range from 279 to 312 K. Large magnetic entropy changes due to the itinerant-electron metamagnetic transition are obtained in the room temperature range for the hydrides of La0.8Ce0.2(Fe 1-xMnx)11.5Si1.5.

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The hydrogen absorption properties and magnetocaloric effect of La _0.8Ce_0.2(Fe_1-xMn_x) _11.5Si_1.5H_y

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