Micromechanics of Ferromagnetic Solids with Weak Magnetocrystalline Anisotropy: a Case Study of Ni-Mn-Ga FSMA Austenite

0387946 - ÚT 2013 RIV AT eng C - Conference Paper (international conference)
Seiner, Hanuš - Sedlák, Petr - Landa, Michal - Heczko, Oleg
Micromechanics of Ferromagnetic Solids with Weak Magnetocrystalline Anisotropy: a Case Study of Ni-Mn-Ga FSMA Austenite.
8th European Solid Mechanics Conference. Graz: Verlag der Technischen Universität Graz, 2012 - (Holzapfen, G.; Ogden, R.), s. 1-2. ISBN 978-3-85125-223-1.
[European Solid Mechanics Conference - ESMC 2012 /8./. Graz (AT), 09.07.2012-13.07.2012]
R&D Projects: GA ČR(CZ) GA101/09/0702
Institutional research plan: CEZ:AV0Z20760514; CEZ:AV0Z10100520
Keywords : micromechanics of ferromagnetic solids * elastic softening * ferromagnetic shape memory alloy
Subject RIV: BI - Acoustics; JI - Composite Materials (FZU-D)

Ferromagnetic solids with small magnetocrystalline anisotropy energy and large magnetostriction exhibit the so-called "DELTA E" - effect. This effect is based on the contribution of the magnetostriction to the strains of the material under external mechanical loads. At the micro-scale, this contribution is provided by the rotation of the magnetization vectors in the lattice, and is, thus, closely related to the magnetic microstructure of the particular material. The present study analyzes this efect in the Ni-Mn-Ga ferromagnetic shape memory alloy, in which the fine magnetic microstructure is induced by pinning of magnetic domain walls on a dense net of anti-phase boundaries (APBs).
Permanent Link: http://hdl.handle.net/11104/0217218