Martensitic transformation and shape memory effect under magnetic field for Ni2MnGa sputtered films containing iron

Makoto Ohtsuka; Hiroyuki Katsuyama; Minoru Matsumoto; Toshiyuki Takagi; Kimio Itagaki

doi:10.1016/j.msea.2006.11.187

Martensitic transformation and shape memory effect under magnetic field for Ni₂MnGa sputtered films containing iron

Makoto Ohtsuka, Hiroyuki Katsuyama, Minoru Matsumoto, Toshiyuki Takagi, Kimio Itagaki

Tohoku University

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

4 Citations (Scopus)

Abstract

The effect of iron addition on the martensitic transformation (MT) and shape memory effect (SME) of the Ni₂MnGa sputtered films was investigated. It was found that the constraint-aged films with more than 8.5 mol% Fe have two phases. MT temperatures monotonously decreased with increasing amount of iron addition, while the Curie temperature increased. The reversible two-way SME by the thermal change was confirmed for all constraint-aged films containing iron through the MT and its reversion. Furthermore, the SME by magnetic field was observed around the MT temperature on cooling for the films containing iron in which MT occurred within the ferromagnetic region. The strain change in a low magnetic field of 1 T became large for the films containing iron. The behavior is as expected from the MT induced by the low magnetic field.

Original language	English
Pages (from-to)	275-278
Number of pages	4
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	481-482
Issue number	1-2 C
DOIs	https://doi.org/10.1016/j.msea.2006.11.187
Publication status	Published - 2008 May 25

Keywords

Constraint-aging
Ferromagnetic shape memory alloy
Martensitic transformation
Ni-Mn-Ga-Fe alloy
Shape memory effect
Sputtered film

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10.1016/j.msea.2006.11.187

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@article{46e4dc23d9a04b7d84c41f84cf21dddd,

title = "Martensitic transformation and shape memory effect under magnetic field for Ni2MnGa sputtered films containing iron",

abstract = "The effect of iron addition on the martensitic transformation (MT) and shape memory effect (SME) of the Ni2MnGa sputtered films was investigated. It was found that the constraint-aged films with more than 8.5 mol% Fe have two phases. MT temperatures monotonously decreased with increasing amount of iron addition, while the Curie temperature increased. The reversible two-way SME by the thermal change was confirmed for all constraint-aged films containing iron through the MT and its reversion. Furthermore, the SME by magnetic field was observed around the MT temperature on cooling for the films containing iron in which MT occurred within the ferromagnetic region. The strain change in a low magnetic field of 1 T became large for the films containing iron. The behavior is as expected from the MT induced by the low magnetic field.",

keywords = "Constraint-aging, Ferromagnetic shape memory alloy, Martensitic transformation, Ni-Mn-Ga-Fe alloy, Shape memory effect, Sputtered film",

author = "Makoto Ohtsuka and Hiroyuki Katsuyama and Minoru Matsumoto and Toshiyuki Takagi and Kimio Itagaki",

note = "Funding Information: The authors are grateful to N. Masahashi, Institute for Materials Research, Tohoku University, for his help in the MT temperatures measurement and K. Koike, Faculty of Engineering, Yamagata University, for the measurement with the vibrating sample magnetometer (VSM). This research was partly supported by the Grants-in-Aid for Scientific Research of the Japan Society for the Promotion of Science (JSPS).",

year = "2008",

month = may,

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doi = "10.1016/j.msea.2006.11.187",

language = "English",

volume = "481-482",

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journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",

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Martensitic transformation and shape memory effect under magnetic field for Ni₂MnGa sputtered films containing iron. / Ohtsuka, Makoto; Katsuyama, Hiroyuki; Matsumoto, Minoru et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 481-482, No. 1-2 C, 25.05.2008, p. 275-278.

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

TY - JOUR

T1 - Martensitic transformation and shape memory effect under magnetic field for Ni2MnGa sputtered films containing iron

AU - Ohtsuka, Makoto

AU - Katsuyama, Hiroyuki

AU - Matsumoto, Minoru

AU - Takagi, Toshiyuki

AU - Itagaki, Kimio

N1 - Funding Information: The authors are grateful to N. Masahashi, Institute for Materials Research, Tohoku University, for his help in the MT temperatures measurement and K. Koike, Faculty of Engineering, Yamagata University, for the measurement with the vibrating sample magnetometer (VSM). This research was partly supported by the Grants-in-Aid for Scientific Research of the Japan Society for the Promotion of Science (JSPS).

PY - 2008/5/25

Y1 - 2008/5/25

N2 - The effect of iron addition on the martensitic transformation (MT) and shape memory effect (SME) of the Ni2MnGa sputtered films was investigated. It was found that the constraint-aged films with more than 8.5 mol% Fe have two phases. MT temperatures monotonously decreased with increasing amount of iron addition, while the Curie temperature increased. The reversible two-way SME by the thermal change was confirmed for all constraint-aged films containing iron through the MT and its reversion. Furthermore, the SME by magnetic field was observed around the MT temperature on cooling for the films containing iron in which MT occurred within the ferromagnetic region. The strain change in a low magnetic field of 1 T became large for the films containing iron. The behavior is as expected from the MT induced by the low magnetic field.

AB - The effect of iron addition on the martensitic transformation (MT) and shape memory effect (SME) of the Ni2MnGa sputtered films was investigated. It was found that the constraint-aged films with more than 8.5 mol% Fe have two phases. MT temperatures monotonously decreased with increasing amount of iron addition, while the Curie temperature increased. The reversible two-way SME by the thermal change was confirmed for all constraint-aged films containing iron through the MT and its reversion. Furthermore, the SME by magnetic field was observed around the MT temperature on cooling for the films containing iron in which MT occurred within the ferromagnetic region. The strain change in a low magnetic field of 1 T became large for the films containing iron. The behavior is as expected from the MT induced by the low magnetic field.

KW - Constraint-aging

KW - Ferromagnetic shape memory alloy

KW - Martensitic transformation

KW - Ni-Mn-Ga-Fe alloy

KW - Shape memory effect

KW - Sputtered film

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Martensitic transformation and shape memory effect under magnetic field for Ni₂MnGa sputtered films containing iron

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