The ferromagnetic shape-memory effect in Ni–Mn–Ga

• Published in: Journal of magnetism and magnetic materials Vol. 290-291; pp. 35 - 41
• Main Authors: Marioni, M.A., O’Handley, R.C., Allen, S.M., Hall, S.R., Paul, D.I., Richard, M.L., Feuchtwanger, J., Peterson, B.W., Chambers, J.M., Techapiesancharoenkij, R.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-04-2005
• Subjects: Ferromagnetic shape-memory; Ni–Mn–Ga; Ni–Mn–Ga; 75.80.+q; Ferromagnetic shape-memory
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2004.11.156

Active materials have long been used in the construction of sensors and devices. Examples are piezo-electric ceramics and shape memory alloys. The more recently developed ferromagnetic shape-memory alloys (FSMAs) have received considerable attention due to their large magnetic field-induced, reversible strains (up to 10%).
In this article, we review the basic physical characteristics of the FSMA Ni–Mn–Ga (crystallography, thermal, mechanical and magnetic behavior). Also, we present some of the works currently under way in the areas of pulse-field and acoustic-assisted actuation, and vibration energy absorption.