Magnetic entropy change in La(Fe0.98Co0.02)11.7Al1.3

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

doi:10.1088/0953-8984/12/46/101

Magnetic entropy change in La(Fe_0.98Co_0.02)_11.7Al_1.3

Feng Xia Hu, Bao Gen Shen, Ji Rong Sun, Zhao Hua Cheng, Xi Xiang Zhang

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

104 Scopus citations

Abstract

Magnetization of compound La(Fe_0.98Co_0.02)_11.7Al_1.3 was measured carefully as functions of temperature and applied field around its Curie temperature of approximately 198 K. Magnetic entropy change |ΔS|, allowing estimation of the magnetocaloric effect (MCE), was determined based on thermodynamic Maxwell's relation. The achieved magnitude of |ΔS| reaches 10.6 J kg^-1 K^-1 under a field of 5 T. The considerable entropy change is believed to be due to the high magnetization and the sharp change in magnetization at T_C. It is found that the magnetic phase transition is completely reversible in temperature, indicating a nature of second-order phase transition.

Original language	English (US)
Pages (from-to)	L691-L696
Journal	Journal of Physics Condensed Matter
Volume	12
Issue number	46
DOIs	https://doi.org/10.1088/0953-8984/12/46/101
State	Published - Nov 20 2000
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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title = "Magnetic entropy change in La(Fe0.98Co0.02)11.7Al1.3",

abstract = "Magnetization of compound La(Fe0.98Co0.02)11.7Al1.3 was measured carefully as functions of temperature and applied field around its Curie temperature of approximately 198 K. Magnetic entropy change |ΔS|, allowing estimation of the magnetocaloric effect (MCE), was determined based on thermodynamic Maxwell's relation. The achieved magnitude of |ΔS| reaches 10.6 J kg-1 K-1 under a field of 5 T. The considerable entropy change is believed to be due to the high magnetization and the sharp change in magnetization at TC. It is found that the magnetic phase transition is completely reversible in temperature, indicating a nature of second-order phase transition.",

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

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T1 - Magnetic entropy change in La(Fe0.98Co0.02)11.7Al1.3

AU - Hu, Feng Xia

AU - Shen, Bao Gen

AU - Sun, Ji Rong

AU - Cheng, Zhao Hua

AU - Zhang, Xi Xiang

PY - 2000/11/20

Y1 - 2000/11/20

N2 - Magnetization of compound La(Fe0.98Co0.02)11.7Al1.3 was measured carefully as functions of temperature and applied field around its Curie temperature of approximately 198 K. Magnetic entropy change |ΔS|, allowing estimation of the magnetocaloric effect (MCE), was determined based on thermodynamic Maxwell's relation. The achieved magnitude of |ΔS| reaches 10.6 J kg-1 K-1 under a field of 5 T. The considerable entropy change is believed to be due to the high magnetization and the sharp change in magnetization at TC. It is found that the magnetic phase transition is completely reversible in temperature, indicating a nature of second-order phase transition.

AB - Magnetization of compound La(Fe0.98Co0.02)11.7Al1.3 was measured carefully as functions of temperature and applied field around its Curie temperature of approximately 198 K. Magnetic entropy change |ΔS|, allowing estimation of the magnetocaloric effect (MCE), was determined based on thermodynamic Maxwell's relation. The achieved magnitude of |ΔS| reaches 10.6 J kg-1 K-1 under a field of 5 T. The considerable entropy change is believed to be due to the high magnetization and the sharp change in magnetization at TC. It is found that the magnetic phase transition is completely reversible in temperature, indicating a nature of second-order phase transition.

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SN - 0953-8984

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SP - L691-L696

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 46

ER -

Magnetic entropy change in La(Fe_0.98Co_0.02)_11.7Al_1.3

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