Martensitic transformation and magnetic properties of Heusler alloy Ni-Fe-Ga ribbon

Z. H. Liu; H. Liu; X. X. Zhang; M. Zhang; X. F. Dai; H. N. Hu; J. L. Chen; G. H. Wu

doi:10.1016/j.physleta.2004.06.088

Martensitic transformation and magnetic properties of Heusler alloy Ni-Fe-Ga ribbon

Z. H. Liu, H. Liu, X. X. Zhang, M. Zhang, X. F. Dai, H. N. Hu, J. L. Chen, G. H. Wu

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

68 Scopus citations

Abstract

The martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Ni_50+xFe_25-xGa₂₅ (x=-1, 0, 1, 2, 3, 4) ribbons have been systematically studied. It has been found that with the increase of Ni concentration, the martensitic transformation temperature increases, but the Curie temperature decreases. Both the two-step thermally induced structural transformation and the one-step transition have been observed in NiFeGa alloys with different compositions. It is found that the two-step transition became the one-step transition after the ribbon being heat treated at 873 K or higher. X-ray diffraction patterns show that only L21→B2 transition occurs in the samples treated at 873 K, while the γ phase will form in the samples treated at higher temperature. Transmission electron microscopy (TEM) studies show that the alloys with martensitic transformation temperature above the room temperature are non-modulated martensite with the large domain size, being different from the stoichiometric Ni₂FeGa alloy that is a modulated martensite with small domain size. The influences of Fe substitution for Ni in Ni₂FeGa on the saturation magnetization and exchange interaction are also discussed.

Original language	English (US)
Pages (from-to)	214-220
Number of pages	7
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	329
Issue number	3
DOIs	https://doi.org/10.1016/j.physleta.2004.06.088
State	Published - Aug 23 2004
Externally published	Yes

Bibliographical note

Funding Information:
This work is supported by National Natural Science Foundation of China Grant No. 50201020 and performed in the framework of the scientific exchange program between the PR China and The Netherlands and by a grant from the Research Grants Council of the Hong Kong Special Administration Region, China (Project No. HKUST6059/02E).

Keywords

Heusler alloy
Magnetism
Martensitic transformation

ASJC Scopus subject areas

General Physics and Astronomy

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10.1016/j.physleta.2004.06.088

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title = "Martensitic transformation and magnetic properties of Heusler alloy Ni-Fe-Ga ribbon",

abstract = "The martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Ni50+xFe25-xGa25 (x=-1, 0, 1, 2, 3, 4) ribbons have been systematically studied. It has been found that with the increase of Ni concentration, the martensitic transformation temperature increases, but the Curie temperature decreases. Both the two-step thermally induced structural transformation and the one-step transition have been observed in NiFeGa alloys with different compositions. It is found that the two-step transition became the one-step transition after the ribbon being heat treated at 873 K or higher. X-ray diffraction patterns show that only L21→B2 transition occurs in the samples treated at 873 K, while the γ phase will form in the samples treated at higher temperature. Transmission electron microscopy (TEM) studies show that the alloys with martensitic transformation temperature above the room temperature are non-modulated martensite with the large domain size, being different from the stoichiometric Ni2FeGa alloy that is a modulated martensite with small domain size. The influences of Fe substitution for Ni in Ni2FeGa on the saturation magnetization and exchange interaction are also discussed.",

keywords = "Heusler alloy, Magnetism, Martensitic transformation",

author = "Liu, {Z. H.} and H. Liu and Zhang, {X. X.} and M. Zhang and Dai, {X. F.} and Hu, {H. N.} and Chen, {J. L.} and Wu, {G. H.}",

note = "Funding Information: This work is supported by National Natural Science Foundation of China Grant No. 50201020 and performed in the framework of the scientific exchange program between the PR China and The Netherlands and by a grant from the Research Grants Council of the Hong Kong Special Administration Region, China (Project No. HKUST6059/02E).",

year = "2004",

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doi = "10.1016/j.physleta.2004.06.088",

language = "English (US)",

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pages = "214--220",

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T1 - Martensitic transformation and magnetic properties of Heusler alloy Ni-Fe-Ga ribbon

AU - Liu, Z. H.

AU - Liu, H.

AU - Zhang, X. X.

AU - Zhang, M.

AU - Dai, X. F.

AU - Hu, H. N.

AU - Chen, J. L.

AU - Wu, G. H.

N1 - Funding Information: This work is supported by National Natural Science Foundation of China Grant No. 50201020 and performed in the framework of the scientific exchange program between the PR China and The Netherlands and by a grant from the Research Grants Council of the Hong Kong Special Administration Region, China (Project No. HKUST6059/02E).

PY - 2004/8/23

Y1 - 2004/8/23

N2 - The martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Ni50+xFe25-xGa25 (x=-1, 0, 1, 2, 3, 4) ribbons have been systematically studied. It has been found that with the increase of Ni concentration, the martensitic transformation temperature increases, but the Curie temperature decreases. Both the two-step thermally induced structural transformation and the one-step transition have been observed in NiFeGa alloys with different compositions. It is found that the two-step transition became the one-step transition after the ribbon being heat treated at 873 K or higher. X-ray diffraction patterns show that only L21→B2 transition occurs in the samples treated at 873 K, while the γ phase will form in the samples treated at higher temperature. Transmission electron microscopy (TEM) studies show that the alloys with martensitic transformation temperature above the room temperature are non-modulated martensite with the large domain size, being different from the stoichiometric Ni2FeGa alloy that is a modulated martensite with small domain size. The influences of Fe substitution for Ni in Ni2FeGa on the saturation magnetization and exchange interaction are also discussed.

AB - The martensitic transformation and magnetic properties of ferromagnetic shape memory alloy Ni50+xFe25-xGa25 (x=-1, 0, 1, 2, 3, 4) ribbons have been systematically studied. It has been found that with the increase of Ni concentration, the martensitic transformation temperature increases, but the Curie temperature decreases. Both the two-step thermally induced structural transformation and the one-step transition have been observed in NiFeGa alloys with different compositions. It is found that the two-step transition became the one-step transition after the ribbon being heat treated at 873 K or higher. X-ray diffraction patterns show that only L21→B2 transition occurs in the samples treated at 873 K, while the γ phase will form in the samples treated at higher temperature. Transmission electron microscopy (TEM) studies show that the alloys with martensitic transformation temperature above the room temperature are non-modulated martensite with the large domain size, being different from the stoichiometric Ni2FeGa alloy that is a modulated martensite with small domain size. The influences of Fe substitution for Ni in Ni2FeGa on the saturation magnetization and exchange interaction are also discussed.

KW - Heusler alloy

KW - Magnetism

KW - Martensitic transformation

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ER -

Martensitic transformation and magnetic properties of Heusler alloy Ni-Fe-Ga ribbon

Abstract

Bibliographical note

Keywords

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