Magnetic entropy change in LaFe 13-xSi x intermetallic compounds

G. H. Wen; R. K. Zheng; X. X. Zhang; W. H. Wang; J. L. Chen; G. H. Wu

doi:10.1063/1.1448793

Magnetic entropy change in LaFe _13-xSi _x intermetallic compounds

G. H. Wen^*, R. K. Zheng, X. X. Zhang, W. H. Wang, J. L. Chen, G. H. Wu

^*Corresponding author for this work

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

32 Scopus citations

Abstract

LaFe _13-xSi _x compounds with x=2.4, 2.6, and 2.8 have been carefully prepared and characterized. X-ray powder diffraction patterns confirm that the samples crystallize in a single NaZn ₁₃-type phase. Magnetic measurements were carried out in a SQUID magnetometer. The Curie temperature T _c of LaFe _13-xSi _x samples decreases nearly 50 K with x increasing from 2.4 to 2.8. Around T _c the samples exhibit a typical second-order phase transition; and no trace of first-order itinerant electron metamagnetic transition is found. So it is reliable to characterize the magnetic entropy change around T _c using magnetic measurement. The maximum values of the magnetic entropy change of LaFe _13-xSi _x samples are found to be, at their Curie temperatures, 5.85, 5.9, and 3.7 J/kg.K for x=2.4, 2.6, and 2.8 under a field change of 5 T (0-5 T). For the quite large magnetic entropy change over a wide temperature range, LaFe _13-xSi _x compounds appear, therefore, to be a potential material candidate for magnetic cooling.

Original language	English (US)
Pages (from-to)	8537-8539
Number of pages	3
Journal	Journal of Applied Physics
Volume	91
Issue number	10 I
DOIs	https://doi.org/10.1063/1.1448793
State	Published - May 15 2002
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Magnetic entropy change in LaFe 13-xSi x intermetallic compounds",

abstract = "LaFe 13-xSi x compounds with x=2.4, 2.6, and 2.8 have been carefully prepared and characterized. X-ray powder diffraction patterns confirm that the samples crystallize in a single NaZn 13-type phase. Magnetic measurements were carried out in a SQUID magnetometer. The Curie temperature T c of LaFe 13-xSi x samples decreases nearly 50 K with x increasing from 2.4 to 2.8. Around T c the samples exhibit a typical second-order phase transition; and no trace of first-order itinerant electron metamagnetic transition is found. So it is reliable to characterize the magnetic entropy change around T c using magnetic measurement. The maximum values of the magnetic entropy change of LaFe 13-xSi x samples are found to be, at their Curie temperatures, 5.85, 5.9, and 3.7 J/kg.K for x=2.4, 2.6, and 2.8 under a field change of 5 T (0-5 T). For the quite large magnetic entropy change over a wide temperature range, LaFe 13-xSi x compounds appear, therefore, to be a potential material candidate for magnetic cooling.",

author = "Wen, {G. H.} and Zheng, {R. K.} and Zhang, {X. X.} and Wang, {W. H.} and Chen, {J. L.} and Wu, {G. H.}",

year = "2002",

month = may,

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doi = "10.1063/1.1448793",

language = "English (US)",

volume = "91",

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T1 - Magnetic entropy change in LaFe 13-xSi x intermetallic compounds

AU - Wen, G. H.

AU - Zheng, R. K.

AU - Zhang, X. X.

AU - Wang, W. H.

AU - Chen, J. L.

AU - Wu, G. H.

PY - 2002/5/15

Y1 - 2002/5/15

N2 - LaFe 13-xSi x compounds with x=2.4, 2.6, and 2.8 have been carefully prepared and characterized. X-ray powder diffraction patterns confirm that the samples crystallize in a single NaZn 13-type phase. Magnetic measurements were carried out in a SQUID magnetometer. The Curie temperature T c of LaFe 13-xSi x samples decreases nearly 50 K with x increasing from 2.4 to 2.8. Around T c the samples exhibit a typical second-order phase transition; and no trace of first-order itinerant electron metamagnetic transition is found. So it is reliable to characterize the magnetic entropy change around T c using magnetic measurement. The maximum values of the magnetic entropy change of LaFe 13-xSi x samples are found to be, at their Curie temperatures, 5.85, 5.9, and 3.7 J/kg.K for x=2.4, 2.6, and 2.8 under a field change of 5 T (0-5 T). For the quite large magnetic entropy change over a wide temperature range, LaFe 13-xSi x compounds appear, therefore, to be a potential material candidate for magnetic cooling.

AB - LaFe 13-xSi x compounds with x=2.4, 2.6, and 2.8 have been carefully prepared and characterized. X-ray powder diffraction patterns confirm that the samples crystallize in a single NaZn 13-type phase. Magnetic measurements were carried out in a SQUID magnetometer. The Curie temperature T c of LaFe 13-xSi x samples decreases nearly 50 K with x increasing from 2.4 to 2.8. Around T c the samples exhibit a typical second-order phase transition; and no trace of first-order itinerant electron metamagnetic transition is found. So it is reliable to characterize the magnetic entropy change around T c using magnetic measurement. The maximum values of the magnetic entropy change of LaFe 13-xSi x samples are found to be, at their Curie temperatures, 5.85, 5.9, and 3.7 J/kg.K for x=2.4, 2.6, and 2.8 under a field change of 5 T (0-5 T). For the quite large magnetic entropy change over a wide temperature range, LaFe 13-xSi x compounds appear, therefore, to be a potential material candidate for magnetic cooling.

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DO - 10.1063/1.1448793

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

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Magnetic entropy change in LaFe _13-xSi _x intermetallic compounds

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