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Títol:	Modelling magnetostructural textures in magnetic shape-memory alloys: Strain and magnetic glass behaviour
Autor/a:	Lloveras Muntané, Pol Marcel; Touchagues, Gilles; Castán, Teresa; Lookman, Turab; Porta, Marcela; Saxena, Avadh; Planes Vila, Antoni
Altres autors:	Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials
Abstract:	In this paper, we propose a model that combines a Landau free energy part and a micromagnetic free energy part aimed at describing a magnetostructural multiferroic. We show that in the limit of high-elastic anisotropy and strong magnetostructural interplay, the model is able to reproduce characteristic strain and magnetization configurations typical of magnetic shapememory materials. For low-elastic anisotropy, in the presence of disorder arising from compositional fluctuations giving rise to a distribution of local transition temperatures, the model is able to reproduce strain glass behaviour. In this case, the temperature dependence of the magnetization measured after zero magnetic field cooling deviates from the magnetization measured after magnetic field cooling protocol, which proves that the strain glass behaviour induces non-ergodicity in the magnetic degrees of freedom as well. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Matèries:	-Àrees temàtiques de la UPC::Energies -Àrees temàtiques de la UPC::Enginyeria dels materials::Materials funcionals::Materials magnètics -Magnetism -Magnetic materials -Magnetic glass -Magnetic shape memory -Martensitic transition -Strain glass -Magnetisme -Materials magnètics
Drets:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Tipus de document:	Article - Versió publicada Article
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