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Issue title: E-MRS Fall Meeting 2005
Article type: Research Article
Authors: L'vov, V.A.a; * | Glavatska, N.b | Glavatskiy, I.b | Ge, Y.c | Heczko, O.c | Söderberg, O.c | Hannula, S.-P.c
Affiliations: [a] Department of Radiophysics, Taras Shevchenko University, Glushkov str. 2, build. 5, 03127, Kiev-127, Ukraine | [b] Institute for Metal Physics, Ukrainian Academy of Sciences, Vernadskii str. 36, 03142, Kiev-142, Ukraine | [c] Helsinki University of Technology, Laboratory of Materials Science, P.O. Box 6200, Espoo FI-02015 TKK, Finland
Correspondence: [*] Corresponding author: Victor A. L'vov, Department of Radiophysics, Taras Shevchenko University, Glushkov str.~2, build. 5, 03127, Kiev-127, Ukraine. Tel.: +38 044 452 01 34 (home); +38 044 526 05 43 (Dept. of Radiophysics); E-mail: [email protected]
Abstract: The isothermal time-dependent deformation of the ferromagnetic Ni-Mn-Ga martensite in the steady magnetic field has been studied both experimentally and theoretically. The role of long wavelength thermal phonons in the deformation process has been disclosed by means of evaluation of the fluctuating mechanical stress, which these phonons induce inside the experimentally observed elements of martensitic structure. A simple relationship between the magnitude of effective fluctuating stress, temperature-dependent elastic modulus and twin width has been derived. In this way, a strong interdependence between the twin width and the effect of thermal phonons on the twin structure is predicted. The fluctuation mechanism of reversibility of the magnetically induced deformation has been deduced from the experimental and theoretical results.
Keywords: Ferromagnetic martensite, magnetic aftereffects, structure, thermal phonons
DOI: 10.3233/JAE-2006-721
Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 23, no. 1-2, pp. 75-79, 2006
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