Great magnetic entropy change in La(Fe, M)13 (M=Si, Al) with Co doping

Feng Xia Hu; Bao Gen Shen; Ji Rong Sun; Xi Xiang Zhang

doi:10.1088/1009-1963/9/7/016

Great magnetic entropy change in La(Fe, M)₁₃ (M=Si, Al) with Co doping

Feng Xia Hu^*, Bao Gen Shen, Ji Rong Sun, Xi Xiang Zhang

^*Corresponding author for this work

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

176 Scopus citations

Abstract

Very large magnetic entropy change ΔS_M, which originates from a fully reversible second-order transition at Curie temperature T_C, has been discovered in compounds La(Fe, A1)₁₃, La(Fe, Al) 13 and those with Co doping. The maximum change ΔS_M≈19J·kg^-1·K^-1, achieved in LaFe_11.4Si_1.6 at 209K upon a 5T magnetic field change, exceeds that of Gd by more than a factor of 2. The T_C of the Co-doped compounds shifts to higher temperatures. ΔS_M still has a considerable large magnitude near room temperature. The phenomena of very large ΔS_M, convenience of adjustment of TC, and also the superiority of low cost, strongly suggest that the compounds La(Fe, M)₁₃ (M=Si, Al) with Co doping are suitable candidates for magnetic refrigerants at high temperatures.

Original language	English (US)
Pages (from-to)	550-553
Number of pages	4
Journal	Chinese Physics
Volume	9
Issue number	7
DOIs	https://doi.org/10.1088/1009-1963/9/7/016
State	Published - Jul 2000
Externally published	Yes

Keywords

Magnetic entropy change
NaZn-type compounds

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1088/1009-1963/9/7/016

Cite this

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title = "Great magnetic entropy change in La(Fe, M)13 (M=Si, Al) with Co doping",

abstract = "Very large magnetic entropy change ΔSM, which originates from a fully reversible second-order transition at Curie temperature TC, has been discovered in compounds La(Fe, A1)13, La(Fe, Al) 13 and those with Co doping. The maximum change ΔSM≈19J·kg-1·K-1, achieved in LaFe11.4Si1.6 at 209K upon a 5T magnetic field change, exceeds that of Gd by more than a factor of 2. The TC of the Co-doped compounds shifts to higher temperatures. ΔSM still has a considerable large magnitude near room temperature. The phenomena of very large ΔSM, convenience of adjustment of TC, and also the superiority of low cost, strongly suggest that the compounds La(Fe, M)13 (M=Si, Al) with Co doping are suitable candidates for magnetic refrigerants at high temperatures.",

keywords = "Magnetic entropy change, NaZn-type compounds",

author = "Hu, {Feng Xia} and Shen, {Bao Gen} and Sun, {Ji Rong} and Zhang, {Xi Xiang}",

year = "2000",

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T1 - Great magnetic entropy change in La(Fe, M)13 (M=Si, Al) with Co doping

AU - Hu, Feng Xia

AU - Shen, Bao Gen

AU - Sun, Ji Rong

AU - Zhang, Xi Xiang

PY - 2000/7

Y1 - 2000/7

N2 - Very large magnetic entropy change ΔSM, which originates from a fully reversible second-order transition at Curie temperature TC, has been discovered in compounds La(Fe, A1)13, La(Fe, Al) 13 and those with Co doping. The maximum change ΔSM≈19J·kg-1·K-1, achieved in LaFe11.4Si1.6 at 209K upon a 5T magnetic field change, exceeds that of Gd by more than a factor of 2. The TC of the Co-doped compounds shifts to higher temperatures. ΔSM still has a considerable large magnitude near room temperature. The phenomena of very large ΔSM, convenience of adjustment of TC, and also the superiority of low cost, strongly suggest that the compounds La(Fe, M)13 (M=Si, Al) with Co doping are suitable candidates for magnetic refrigerants at high temperatures.

AB - Very large magnetic entropy change ΔSM, which originates from a fully reversible second-order transition at Curie temperature TC, has been discovered in compounds La(Fe, A1)13, La(Fe, Al) 13 and those with Co doping. The maximum change ΔSM≈19J·kg-1·K-1, achieved in LaFe11.4Si1.6 at 209K upon a 5T magnetic field change, exceeds that of Gd by more than a factor of 2. The TC of the Co-doped compounds shifts to higher temperatures. ΔSM still has a considerable large magnitude near room temperature. The phenomena of very large ΔSM, convenience of adjustment of TC, and also the superiority of low cost, strongly suggest that the compounds La(Fe, M)13 (M=Si, Al) with Co doping are suitable candidates for magnetic refrigerants at high temperatures.

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KW - NaZn-type compounds

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