New sequences of phase transition in Ni-Mn-Ga ferromagnetic shape memory nanoparticles

D. M. Liu; Z. H. Nie; Y. D. Wang; Y. D. Liu; G. Wang; Y. Ren; L. Zuo

doi:10.1007/s11661-007-9435-8

New sequences of phase transition in Ni-Mn-Ga ferromagnetic shape memory nanoparticles

D. M. Liu, Z. H. Nie, Y. D. Wang^*, Y. D. Liu, G. Wang, Y. Ren, L. Zuo

^*Corresponding author for this work

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

24 Citations (Scopus)

Abstract

In-situ high-energy X-ray diffraction was used for tracing the structural transitions in Ni₂MnGa and Ni₄₇ Mn₂₅Ga₂₂Co₆ nanoparticles that were prepared by a ball-milling and subsequent annealing process. A decrease in martensitic transformation temperature was evidenced in all annealed nanoparticles. It was found that a three-layered modulated structure, usually observed as a metastable premartensitic phase in coarse-grained alloys, becomes a stable phase in the annealed Ni₂MnGa nanoparticles up to 4 K.

Original language	English
Pages (from-to)	466-469
Number of pages	4
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	39
Issue number	2
DOIs	https://doi.org/10.1007/s11661-007-9435-8
Publication status	Published - Feb 2008
Externally published	Yes

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abstract = "In-situ high-energy X-ray diffraction was used for tracing the structural transitions in Ni2MnGa and Ni47 Mn25Ga22Co6 nanoparticles that were prepared by a ball-milling and subsequent annealing process. A decrease in martensitic transformation temperature was evidenced in all annealed nanoparticles. It was found that a three-layered modulated structure, usually observed as a metastable premartensitic phase in coarse-grained alloys, becomes a stable phase in the annealed Ni2MnGa nanoparticles up to 4 K.",

author = "Liu, {D. M.} and Nie, {Z. H.} and Wang, {Y. D.} and Liu, {Y. D.} and G. Wang and Y. Ren and L. Zuo",

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AU - Liu, D. M.

AU - Nie, Z. H.

AU - Wang, Y. D.

AU - Liu, Y. D.

AU - Wang, G.

AU - Ren, Y.

AU - Zuo, L.

PY - 2008/2

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N2 - In-situ high-energy X-ray diffraction was used for tracing the structural transitions in Ni2MnGa and Ni47 Mn25Ga22Co6 nanoparticles that were prepared by a ball-milling and subsequent annealing process. A decrease in martensitic transformation temperature was evidenced in all annealed nanoparticles. It was found that a three-layered modulated structure, usually observed as a metastable premartensitic phase in coarse-grained alloys, becomes a stable phase in the annealed Ni2MnGa nanoparticles up to 4 K.

AB - In-situ high-energy X-ray diffraction was used for tracing the structural transitions in Ni2MnGa and Ni47 Mn25Ga22Co6 nanoparticles that were prepared by a ball-milling and subsequent annealing process. A decrease in martensitic transformation temperature was evidenced in all annealed nanoparticles. It was found that a three-layered modulated structure, usually observed as a metastable premartensitic phase in coarse-grained alloys, becomes a stable phase in the annealed Ni2MnGa nanoparticles up to 4 K.

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ER -

New sequences of phase transition in Ni-Mn-Ga ferromagnetic shape memory nanoparticles

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