Stress-assisted magnetic-field-induced strain in Ni-Fe-Ga-Co ferromagnetic shape memory alloys

H. Morito; A. Fujita; K. Oikawa; K. Ishida; K. Fukamichi; R. Kainuma

doi:10.1063/1.2450667

Stress-assisted magnetic-field-induced strain in Ni-Fe-Ga-Co ferromagnetic shape memory alloys

H. Morito, A. Fujita, K. Oikawa, K. Ishida, K. Fukamichi, R. Kainuma

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

55 Citations (Scopus)

Abstract

To obtain a large strain for Ni-Fe-Ga ferromagnetic shape memory alloys, the Curie temperature was increased by adding Co, and the magnetic-field-induced strain (MFIS) has been investigated under static stresses. The magnetocrystalline anisotropy constant K is increased by the addition of Co, and Ni49 Fe18 Ga27 Co6 alloy gives a relatively large value of 1.15× 106 erg cm3 at 300 K. From the stress-strain curves for this alloy, the twinning stress is estimated to be 8-9 MPa. Consequently, the Ni49 Fe18 Ga27 Co6 alloy exhibits a large MFIS of about 8.5% at room temperature under a static compressive stress of about 8 MPa.

Original language	English
Article number	062505
Journal	Applied Physics Letters
Volume	90
Issue number	6
DOIs	https://doi.org/10.1063/1.2450667
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Stress-assisted magnetic-field-induced strain in Ni-Fe-Ga-Co ferromagnetic shape memory alloys",

abstract = "To obtain a large strain for Ni-Fe-Ga ferromagnetic shape memory alloys, the Curie temperature was increased by adding Co, and the magnetic-field-induced strain (MFIS) has been investigated under static stresses. The magnetocrystalline anisotropy constant K is increased by the addition of Co, and Ni49 Fe18 Ga27 Co6 alloy gives a relatively large value of 1.15× 106 erg cm3 at 300 K. From the stress-strain curves for this alloy, the twinning stress is estimated to be 8-9 MPa. Consequently, the Ni49 Fe18 Ga27 Co6 alloy exhibits a large MFIS of about 8.5% at room temperature under a static compressive stress of about 8 MPa.",

author = "H. Morito and A. Fujita and K. Oikawa and K. Ishida and K. Fukamichi and R. Kainuma",

note = "Funding Information: The authors wish to thank Y. Sutou, T. Ota, and T. Takagi for their experimental support. A part of the present study was supported by the Grant-in-Aids for Core Research for Evolutional Science and Technology (CREST), Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan, and the Research Fellow of the Japan Society.",

year = "2007",

doi = "10.1063/1.2450667",

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journal = "Applied Physics Letters",

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TY - JOUR

T1 - Stress-assisted magnetic-field-induced strain in Ni-Fe-Ga-Co ferromagnetic shape memory alloys

AU - Morito, H.

AU - Fujita, A.

AU - Oikawa, K.

AU - Ishida, K.

AU - Fukamichi, K.

AU - Kainuma, R.

N1 - Funding Information: The authors wish to thank Y. Sutou, T. Ota, and T. Takagi for their experimental support. A part of the present study was supported by the Grant-in-Aids for Core Research for Evolutional Science and Technology (CREST), Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan, and the Research Fellow of the Japan Society.

PY - 2007

Y1 - 2007

N2 - To obtain a large strain for Ni-Fe-Ga ferromagnetic shape memory alloys, the Curie temperature was increased by adding Co, and the magnetic-field-induced strain (MFIS) has been investigated under static stresses. The magnetocrystalline anisotropy constant K is increased by the addition of Co, and Ni49 Fe18 Ga27 Co6 alloy gives a relatively large value of 1.15× 106 erg cm3 at 300 K. From the stress-strain curves for this alloy, the twinning stress is estimated to be 8-9 MPa. Consequently, the Ni49 Fe18 Ga27 Co6 alloy exhibits a large MFIS of about 8.5% at room temperature under a static compressive stress of about 8 MPa.

AB - To obtain a large strain for Ni-Fe-Ga ferromagnetic shape memory alloys, the Curie temperature was increased by adding Co, and the magnetic-field-induced strain (MFIS) has been investigated under static stresses. The magnetocrystalline anisotropy constant K is increased by the addition of Co, and Ni49 Fe18 Ga27 Co6 alloy gives a relatively large value of 1.15× 106 erg cm3 at 300 K. From the stress-strain curves for this alloy, the twinning stress is estimated to be 8-9 MPa. Consequently, the Ni49 Fe18 Ga27 Co6 alloy exhibits a large MFIS of about 8.5% at room temperature under a static compressive stress of about 8 MPa.

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