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Information × Registration Number 0214U008997, 0112U001009 , R & D reports Title The theory of sound and spin waves in the vicinity of phase transitions in the lattice. popup.stage_title Head Baryaktar V, Registration Date 22-12-2014 Organization Institute of magnetism of NASU popup.description2 The behavior of the spectra of coupled magnetoacoustic waves 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 results are used for interpretation the experimental data for the Ni-Mn-Ga alloy. the The phenomenon of a sharp decrease of the elastic modules of the alloy at the approach to the martensitic phase transitions was theoretically explained. It is shown that in this case a nonuniform magnetostriction performs the main influence on the elastic properties of the material. A theoretical estimation of the effect of a uniform magnetostriction on the elastic modules of alloys with shape memory effect was performed. The obtained results explain the experimental temperature dependence of the elastic Young's modulus of the Ni-Mn-Ga alloy at the paramagnetic-ferromagnetic transformation. Кінцевий продукт: Product Description popup.authors Ба ряхтар В.Г. Данилевич О.Г. Косогор А.О. Львов В.А. popup.nrat_date 2020-04-02 Close