The underlying mechanisms responsible for the giant magnetic or mechanical field-induced-strains in ferromagnetic shape memory alloys are briefly discussed based on a phenomenological approach. The fundamental aspect is illustrated by the experimental results related to the lattice, mechanical and magnetic instabilities in the prototype Ni-Mn-Ga materials. A strong linear dependence of the magnetization upon the twinning deformation of martensite is considered for the sensor applications. An actuation capability on the microscale is found in the Ni-Mn-Ga/substrate thin film composites.
Ferromagnetic shape memory alloys: Scientific and applied aspects.
Besseghini S
2008
Abstract
The underlying mechanisms responsible for the giant magnetic or mechanical field-induced-strains in ferromagnetic shape memory alloys are briefly discussed based on a phenomenological approach. The fundamental aspect is illustrated by the experimental results related to the lattice, mechanical and magnetic instabilities in the prototype Ni-Mn-Ga materials. A strong linear dependence of the magnetization upon the twinning deformation of martensite is considered for the sensor applications. An actuation capability on the microscale is found in the Ni-Mn-Ga/substrate thin film composites.File in questo prodotto:
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