Size effects on magnetic actuation in Ni-Mn-Ga shape-memory alloys.
@article{Dunand2011SizeEO, title={Size effects on magnetic actuation in Ni-Mn-Ga shape-memory alloys.}, author={D. Dunand and P. M{\"u}llner}, journal={Advanced materials}, year={2011}, volume={23 2}, pages={ 216-32 } }
The off-stoichiometric Ni(2)MnGa Heusler alloy is a magnetic shape-memory alloy capable of reversible magnetic-field-induced strains (MFIS). These are generated by twin boundaries moving under the influence of an internal stress produced by a magnetic field through the magnetocrystalline anisotropy. While MFIS are very large (up to 10%) for monocrystalline Ni-Mn-Ga, they are near zero (<0.01%) in fine-grained polycrystals due to incompatibilities during twinning of neighboring grains and the… CONTINUE READING
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