Promising ferromagnetic Ni-Co-Al shape memory alloy system

K. Oikawa; L. Wulff; T. Iijima; F. Gejima; T. Ohmori; A. Fujita; K. Fukamichi; R. Kainuma; K. Ishida

doi:10.1063/1.1418259

Promising ferromagnetic Ni-Co-Al shape memory alloy system

K. Oikawa, L. Wulff, T. Iijima, F. Gejima, T. Ohmori, A. Fujita, K. Fukamichi, R. Kainuma, K. Ishida

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

340 Citations (Scopus)

Abstract

A system of ferromagnetic β phase Ni-Co-Al alloys with an ordered B2 structure that exhibits the shape memory effect has been developed. The alloys of this system within the composition range Ni (30-45 at. %) Co-(27-32 at. %) Al, undergo a paramagnetic/ferromagnetic transition as well as a thermoelastic martensitic transformation from the β to the β′ (L1₀) phase. The Curie and the martensitic start temperatures in the β phase can be controlled independently to fall within the range of 120-420 K. The specimens from some of the alloys undergoing martensitic transformation from ferromagnetic β phase to ferromagnetic β′ phase are accompanied by the shape memory effect. These ferromagnetic shape memory alloys hold great promise as new smart materials.

Original language	English
Pages (from-to)	3290-3292
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	20
DOIs	https://doi.org/10.1063/1.1418259
Publication status	Published - 2001 Nov 12
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.1418259

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abstract = "A system of ferromagnetic β phase Ni-Co-Al alloys with an ordered B2 structure that exhibits the shape memory effect has been developed. The alloys of this system within the composition range Ni (30-45 at. %) Co-(27-32 at. %) Al, undergo a paramagnetic/ferromagnetic transition as well as a thermoelastic martensitic transformation from the β to the β′ (L10) phase. The Curie and the martensitic start temperatures in the β phase can be controlled independently to fall within the range of 120-420 K. The specimens from some of the alloys undergoing martensitic transformation from ferromagnetic β phase to ferromagnetic β′ phase are accompanied by the shape memory effect. These ferromagnetic shape memory alloys hold great promise as new smart materials.",

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AU - Oikawa, K.

AU - Wulff, L.

AU - Iijima, T.

AU - Gejima, F.

AU - Ohmori, T.

AU - Fujita, A.

AU - Fukamichi, K.

AU - Kainuma, R.

AU - Ishida, K.

PY - 2001/11/12

Y1 - 2001/11/12

N2 - A system of ferromagnetic β phase Ni-Co-Al alloys with an ordered B2 structure that exhibits the shape memory effect has been developed. The alloys of this system within the composition range Ni (30-45 at. %) Co-(27-32 at. %) Al, undergo a paramagnetic/ferromagnetic transition as well as a thermoelastic martensitic transformation from the β to the β′ (L10) phase. The Curie and the martensitic start temperatures in the β phase can be controlled independently to fall within the range of 120-420 K. The specimens from some of the alloys undergoing martensitic transformation from ferromagnetic β phase to ferromagnetic β′ phase are accompanied by the shape memory effect. These ferromagnetic shape memory alloys hold great promise as new smart materials.

AB - A system of ferromagnetic β phase Ni-Co-Al alloys with an ordered B2 structure that exhibits the shape memory effect has been developed. The alloys of this system within the composition range Ni (30-45 at. %) Co-(27-32 at. %) Al, undergo a paramagnetic/ferromagnetic transition as well as a thermoelastic martensitic transformation from the β to the β′ (L10) phase. The Curie and the martensitic start temperatures in the β phase can be controlled independently to fall within the range of 120-420 K. The specimens from some of the alloys undergoing martensitic transformation from ferromagnetic β phase to ferromagnetic β′ phase are accompanied by the shape memory effect. These ferromagnetic shape memory alloys hold great promise as new smart materials.

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Promising ferromagnetic Ni-Co-Al shape memory alloy system

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