Magnetic entropy change and magnetoresistance in the LaFe 11.375Al 1.625 compound

Feng Xia Hu; Guang Jun Wang; Jing Wang; Zhi Gang Sun; Cheng Dong; Hong Chen; Xi Xiang Zhang; Ji Rong Sun; Zhao Hua Cheng; Bao Gen Shen

doi:10.1063/1.1449444

Magnetic entropy change and magnetoresistance in the LaFe _11.375Al _1.625 compound

Feng Xia Hu^*, Guang Jun Wang, Jing Wang, Zhi Gang Sun, Cheng Dong, Hong Chen, Xi Xiang Zhang, Ji Rong Sun, Zhao Hua Cheng, Bao Gen Shen

^*Corresponding author for this work

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

18 Scopus citations

Abstract

Large magnetic entropy change ΔS with a nearly temperature- independent magnitude over a wide temperature range (about 70 K span from ∼140 K to 210 K) was observed in an Fe-based NaZn ₁₃-type compound LaFe _11.375Al _1.625. Such a behavior of magnetic entropy change is ascribed to two closely spaced magnetic transitions. One at 181 K (T _N) with second-order nature is from the paramagnetic to antiferromagnetic state; another at 140 K (T _O) with first-order nature, temperature hysteresis ∼5 K, is from antiferromagnetic to ferromagnetic state. At the antiferromagnetic to ferromagnetic transition a large change of resistance was found, which can be induced as a function of temperature as well as field. The magnetoresistence under a field of 1 T reaches 3.4%.

Original language	English (US)
Pages (from-to)	7836-7838
Number of pages	3
Journal	Journal of Applied Physics
Volume	91
Issue number	10 I
DOIs	https://doi.org/10.1063/1.1449444
State	Published - May 15 2002
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Magnetic entropy change and magnetoresistance in the LaFe 11.375Al 1.625 compound",

abstract = "Large magnetic entropy change ΔS with a nearly temperature- independent magnitude over a wide temperature range (about 70 K span from ∼140 K to 210 K) was observed in an Fe-based NaZn 13-type compound LaFe 11.375Al 1.625. Such a behavior of magnetic entropy change is ascribed to two closely spaced magnetic transitions. One at 181 K (T N) with second-order nature is from the paramagnetic to antiferromagnetic state; another at 140 K (T O) with first-order nature, temperature hysteresis ∼5 K, is from antiferromagnetic to ferromagnetic state. At the antiferromagnetic to ferromagnetic transition a large change of resistance was found, which can be induced as a function of temperature as well as field. The magnetoresistence under a field of 1 T reaches 3.4%.",

author = "Hu, {Feng Xia} and Wang, {Guang Jun} and Jing Wang and Sun, {Zhi Gang} and Cheng Dong and Hong Chen and Zhang, {Xi Xiang} and Sun, {Ji Rong} and Cheng, {Zhao Hua} and Shen, {Bao Gen}",

year = "2002",

month = may,

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doi = "10.1063/1.1449444",

language = "English (US)",

volume = "91",

pages = "7836--7838",

journal = "Journal of Applied Physics",

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TY - JOUR

T1 - Magnetic entropy change and magnetoresistance in the LaFe 11.375Al 1.625 compound

AU - Hu, Feng Xia

AU - Wang, Guang Jun

AU - Wang, Jing

AU - Sun, Zhi Gang

AU - Dong, Cheng

AU - Chen, Hong

AU - Zhang, Xi Xiang

AU - Sun, Ji Rong

AU - Cheng, Zhao Hua

AU - Shen, Bao Gen

PY - 2002/5/15

Y1 - 2002/5/15

N2 - Large magnetic entropy change ΔS with a nearly temperature- independent magnitude over a wide temperature range (about 70 K span from ∼140 K to 210 K) was observed in an Fe-based NaZn 13-type compound LaFe 11.375Al 1.625. Such a behavior of magnetic entropy change is ascribed to two closely spaced magnetic transitions. One at 181 K (T N) with second-order nature is from the paramagnetic to antiferromagnetic state; another at 140 K (T O) with first-order nature, temperature hysteresis ∼5 K, is from antiferromagnetic to ferromagnetic state. At the antiferromagnetic to ferromagnetic transition a large change of resistance was found, which can be induced as a function of temperature as well as field. The magnetoresistence under a field of 1 T reaches 3.4%.

AB - Large magnetic entropy change ΔS with a nearly temperature- independent magnitude over a wide temperature range (about 70 K span from ∼140 K to 210 K) was observed in an Fe-based NaZn 13-type compound LaFe 11.375Al 1.625. Such a behavior of magnetic entropy change is ascribed to two closely spaced magnetic transitions. One at 181 K (T N) with second-order nature is from the paramagnetic to antiferromagnetic state; another at 140 K (T O) with first-order nature, temperature hysteresis ∼5 K, is from antiferromagnetic to ferromagnetic state. At the antiferromagnetic to ferromagnetic transition a large change of resistance was found, which can be induced as a function of temperature as well as field. The magnetoresistence under a field of 1 T reaches 3.4%.

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U2 - 10.1063/1.1449444

DO - 10.1063/1.1449444

M3 - Article

AN - SCOPUS:0037094595

SN - 0021-8979

VL - 91

SP - 7836

EP - 7838

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 10 I

ER -

Magnetic entropy change and magnetoresistance in the LaFe _11.375Al _1.625 compound

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