TY - JOUR
T1 - Two-way shape memory behavior of sputter-deposited Ni-rich Ni 2MnGa films
AU - Ohtsuka, Makoto
AU - Matsumoto, Minoru
AU - Itagaki, Kimio
PY - 2006/12/1
Y1 - 2006/12/1
N2 - The properties of the Ni-rich Ni2MnGa films and their shape memory behavior are investigated with respect to various sputtering conditions. The films are deposited on a poly-vinyl alcohol substrate with a radio-frequency magnetron sputtering apparatus using Ni50Mn25Ga 25 and Ni52Mn24Ga24 targets. The sputtering power is in the range of 50-400 W. After separating from the substrate, the films are vacuum-annealed at 1073 K for 3.6 ks. The chemical composition of the films depends on the sputtering power. The martensitic transformation temperature increases with the valence electron density of the films, while the Curie temperature slightly decreases. The film obtained with 50 W using the Ni50Mn25Ga25 target after heat treatment at 1073 K shows a two-way shape memory effect through the martensitic transformation and its reversion.
AB - The properties of the Ni-rich Ni2MnGa films and their shape memory behavior are investigated with respect to various sputtering conditions. The films are deposited on a poly-vinyl alcohol substrate with a radio-frequency magnetron sputtering apparatus using Ni50Mn25Ga 25 and Ni52Mn24Ga24 targets. The sputtering power is in the range of 50-400 W. After separating from the substrate, the films are vacuum-annealed at 1073 K for 3.6 ks. The chemical composition of the films depends on the sputtering power. The martensitic transformation temperature increases with the valence electron density of the films, while the Curie temperature slightly decreases. The film obtained with 50 W using the Ni50Mn25Ga25 target after heat treatment at 1073 K shows a two-way shape memory effect through the martensitic transformation and its reversion.
KW - Crystal structure
KW - Ferromagnetic shape memory alloy
KW - Martensitic transformation
KW - Ni-Mn-Ga
KW - Sputtered film
KW - Two-way shape memory effect
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U2 - 10.1177/1045389X06064606
DO - 10.1177/1045389X06064606
M3 - Article
AN - SCOPUS:33751556201
SN - 1045-389X
VL - 17
SP - 1069
EP - 1074
JO - Journal of Intelligent Material Systems and Structures
JF - Journal of Intelligent Material Systems and Structures
IS - 12
ER -