Mechanical, magnetic and magnetostrictive properties of porous Fe-Ga films prepared by electrodeposition
Nicolenco, Aliona (Universitat Autònoma de Barcelona. Departament de Física)
Chen, Yu (Universitat Autònoma de Barcelona. Departament de Física)
Tsyntsaru, Natalia (Institute of Applied Physics (Republic of Moldova))
Cesiulis, Henrikas (Vilnius University. Physics Department)
Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)

Data:	2021
Resum:	Magnetostriction, known as the ability of magnetic materials to expand or contract in response to magnetic field, is a key property of Fe-Ga alloys exploited in various types of transducers. Usually, thin films of Fe-Ga deposited on rigid substrates suffer from a clamping effect that hinders the propagation of strain. Herein, Fe-Ga films with macroporous, not fully constrained, geometry are prepared by electrodeposition on metallized silicon substrates templated with sub-micrometer-sized polystyrene spheres. For comparison, fully-dense and inherently nanoporous films are prepared by sputtering and electrodeposition, respectively. The electrodeposition mechanism is discussed in terms of electrochemically active species distribution and partial current densities. The composition of the Fe-Ga films has been tuned (2-40 at. % Ga) by varying the electrodeposition parameters. A complete assessment of the nanomechanical and magnetic properties of the films with variable composition and porosity has been performed for an optimized performance. The magnetostriction has been studied by X-ray diffraction applying an in-situ magnetic field. The results demonstrate a larger magnetic-field-induced crystal deformation in templated (macroporous) films compared to the non-templated and fully-dense counterparts. The observed effects in porous Fe-Ga films are very appealing for the design of various strain-engineered nanomaterials, e. g. , energy transducers or magnetoelectric composites.
Ajuts:	European Commission 892661 European Commission 778357 European Commission 648454 European Commission 875018 Agencia Estatal de Investigación MAT2017-86357-C3-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-292
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Electrodeposition ; Fe-Ga alloy ; Porous films ; Nanoindentation ; Magnetostriction
Publicat a:	Materials & Design, Vol. 208 (October 2021) , art. 109915, ISSN 0264-1275

DOI: 10.1016/j.matdes.2021.109915

11 p, 2.3 MB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > Grup de nanoenginyeria de materials, nanomagnetisme i nanomecànica (Gnm3) > SPIN-PORICS
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