Large magnetic entropy change in compound LaFe11.44Al1.56 with two magnetic phase transitions

Feng Xia Hu; Bao Gen Shen; Ji Rong Sun; A. B. Pakhomov; C. Y. Wong; X. X. Zhang; Shao Ying Zhang; Guang Jun Wang; Zhao Hua Cheng

doi:10.1109/20.951162

Large magnetic entropy change in compound LaFe_11.44Al_1.56 with two magnetic phase transitions

Feng Xia Hu^*, Bao Gen Shen, Ji Rong Sun, A. B. Pakhomov, C. Y. Wong, X. X. Zhang, Shao Ying Zhang, Guang Jun Wang, Zhao Hua Cheng

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

30 Scopus citations

Abstract

It is shown that Fe-based compound LaFe_11.44 Al_1.56 with cubic NaZn₁₃-type structure undergoes both a second order and a first order phase transitions. In small fields, it orders antiferromagnetically at T_N = 186 K, and ferromagnetism is established at T₀ ≈ 127 K. At T > T₀, field-induced metamagnetic transition between the two phases is observed in larger fields. The magnetic entropy change |δS|, estimated as a function of temperature from magnetization curves, has large values near the first-order transition. Metamagnetic transformation leads to an asymmetric broadening of the maximum with increasing field. This compound may be useful for magnetic refrigeration.

Original language	English (US)
Pages (from-to)	2328-2330
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.951162
State	Published - Jul 2001
Externally published	Yes
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: Jan 7 2001 → Jan 11 2001

Keywords

Magnetocaloric effect
Metamagnetic transition
NaZn-type compounds

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/20.951162

Cite this

@article{8b88a0c540bb4c5d93daf31ab6700478,

title = "Large magnetic entropy change in compound LaFe11.44Al1.56 with two magnetic phase transitions",

abstract = "It is shown that Fe-based compound LaFe11.44 Al1.56 with cubic NaZn13-type structure undergoes both a second order and a first order phase transitions. In small fields, it orders antiferromagnetically at TN = 186 K, and ferromagnetism is established at T0 ≈ 127 K. At T > T0, field-induced metamagnetic transition between the two phases is observed in larger fields. The magnetic entropy change |δS|, estimated as a function of temperature from magnetization curves, has large values near the first-order transition. Metamagnetic transformation leads to an asymmetric broadening of the maximum with increasing field. This compound may be useful for magnetic refrigeration.",

keywords = "Magnetocaloric effect, Metamagnetic transition, NaZn-type compounds",

author = "Hu, {Feng Xia} and Shen, {Bao Gen} and Sun, {Ji Rong} and Pakhomov, {A. B.} and Wong, {C. Y.} and Zhang, {X. X.} and Zhang, {Shao Ying} and Wang, {Guang Jun} and Cheng, {Zhao Hua}",

year = "2001",

month = jul,

doi = "10.1109/20.951162",

language = "English (US)",

volume = "37",

pages = "2328--2330",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers",

number = "4 I",

note = "8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

}

TY - JOUR

T1 - Large magnetic entropy change in compound LaFe11.44Al1.56 with two magnetic phase transitions

AU - Hu, Feng Xia

AU - Shen, Bao Gen

AU - Sun, Ji Rong

AU - Pakhomov, A. B.

AU - Wong, C. Y.

AU - Zhang, X. X.

AU - Zhang, Shao Ying

AU - Wang, Guang Jun

AU - Cheng, Zhao Hua

PY - 2001/7

Y1 - 2001/7

N2 - It is shown that Fe-based compound LaFe11.44 Al1.56 with cubic NaZn13-type structure undergoes both a second order and a first order phase transitions. In small fields, it orders antiferromagnetically at TN = 186 K, and ferromagnetism is established at T0 ≈ 127 K. At T > T0, field-induced metamagnetic transition between the two phases is observed in larger fields. The magnetic entropy change |δS|, estimated as a function of temperature from magnetization curves, has large values near the first-order transition. Metamagnetic transformation leads to an asymmetric broadening of the maximum with increasing field. This compound may be useful for magnetic refrigeration.

AB - It is shown that Fe-based compound LaFe11.44 Al1.56 with cubic NaZn13-type structure undergoes both a second order and a first order phase transitions. In small fields, it orders antiferromagnetically at TN = 186 K, and ferromagnetism is established at T0 ≈ 127 K. At T > T0, field-induced metamagnetic transition between the two phases is observed in larger fields. The magnetic entropy change |δS|, estimated as a function of temperature from magnetization curves, has large values near the first-order transition. Metamagnetic transformation leads to an asymmetric broadening of the maximum with increasing field. This compound may be useful for magnetic refrigeration.

KW - Magnetocaloric effect

KW - Metamagnetic transition

KW - NaZn-type compounds

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U2 - 10.1109/20.951162

DO - 10.1109/20.951162

M3 - Conference article

AN - SCOPUS:0035386581

SN - 0018-9464

VL - 37

SP - 2328

EP - 2330

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 4 I

T2 - 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag)

Y2 - 7 January 2001 through 11 January 2001

ER -