Search academic texts

Registration Number

0215U003035, 0114U007080 , R & D reports

Title

Magnetoelastic interaction in shape-memory materials.

Head

Danilevich A,,

Registration Date

15-01-2015

Organization

Institute of magnetism of NASU

Description

A theoretical model that describes the interaction of spin and elastic waves with accounting of their damping in the vicinity of structural phase transitions (martensitic transformations in shape-memory materials) was obtained. The dispersion laws of coupled magnetoacoustic waves in magnetically ordered materials of different symmetry were calculated. The analysis of obtained dispersion laws in the vicinity of the spin-reorientation phase transitions was performed. The behavior of these spectra in the vicinity of phase transitions in the lattice, namely in the vicinity of martensitic phase transformations in materials with shape memory effect was considered. The phenomenon of a sharp decrease in the elastic modules of materials with shape memory effect on approaching the martensitic phase transitions was theoretically explained. Also, a theoretical explanation of the experimental temperature dependence of the elastic modulus of materials in the paramagnetic-ferromagnetic state transition was proposed. A consistent theory of description of dissipative phenomena in magnetic materials was constructed. The spin waves dispersion laws ferromagnets with different symmetry were obtained with accounting of damping of both relativistic and exchange nature.

Product Description

popup.authors

Беляк Д.С.
Данилевич О.Г.
Данилевич О.Й.
Косогор А.О.
Кубишта Л.С.
Салюк О.Ю.
Хімін Р.С.
Черненко В.А.
Шарай І.В.