ac field-induced actuation of single crystal Ni–Mn–Ga

Single crystals of Ni–Mn–Ga have shown 6% field induced strain in quasistatic actuation against an applied load. Here we report the ac actuation response and a magnetostrictivity constant of an off-stoichiometry single crystal of Ni–Mn–Ga measuring approximately 14×5.6×1 mm. This sample shows a maxi...

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Bibliographic Details
Published in:Journal of applied physics 2002-05, Vol.91 (10), p.7810-7811
Main Authors: Henry, C. P., Bono, D., Feuchtwanger, J., Allen, S. M., O’Handley, R. C.
Format: Article
Language:English
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Summary:Single crystals of Ni–Mn–Ga have shown 6% field induced strain in quasistatic actuation against an applied load. Here we report the ac actuation response and a magnetostrictivity constant of an off-stoichiometry single crystal of Ni–Mn–Ga measuring approximately 14×5.6×1 mm. This sample shows a maximum 3% strain under a bias stress of 1.1–1.5 MPa. The deficit between the low-frequency ac field-induced strain and the 6% dc results are discussed. Additionally, the ε–H indicate a peak differential value for d13 of 1%/kOe (13×10−8 m/A) which is about two times that of Terfenol-D.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1449441