Iris Publishers - Modern Concepts in Material Science (MCMS)

Atomic and Electronic Structure in Thin Foils Ni51Ti49
Material Science

One of the most famous and widely researched materials with shape memory is titanium nickelide. Materials with shape memory are characterized by the presence of thermoelastic martensite in their structure. Such martensite arises as a result of deformation, leading to mechanochemical reactions in the localization zones of plastic deformation of the nanoscale level [1].
The result of mechanochemical reactions are phases with new structural states, and accordingly, with new properties. In the study of massive samples and thinned foils of titanium nickelide, it was not known about the possibility of the appearance of magnetization in them. For the first time, the authors of [2] indicated this possibility. The authors associated the appearance of magnetization with the appearance of deformation martensite with the tetrahedrally packed Frank – Casper structure. A feature of this structure is the displacement of atoms from the positions associated with the cubic symmetry of the crystal lattice. A decrease in symmetry can lead to the appearance of magnetization [3].

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