Sub-micron magnetic patterns and local variations of adhesion force induced in non-ferromagnetic amorphous steel by femtosecond pulsed laser irradiation
Zhang, Huiyan (Universitat Autònoma de Barcelona. Departament de Física)
Feng, Yuping (Universitat Autònoma de Barcelona. Departament de Física)
Nieto, Daniel (Universidade de Santiago de Compostela. Departamento de Física Aplicada)
García-Lecina, Eva (IK4-CIDETEC. Unidad Superfícies)
Mcdaniel, Clare (National University of Ireland. National Centre for Laser Applications)
Díaz Marcos, Jordi (Universitat de Barcelona. Unitat de Tècniques Nanomètriques)
Flores-Arias, María Teresa (Universidade de Santiago de Compostela. Departamento de Física Aplicada)
O'connor, Gerard M. (National University of Ireland. National Centre for Laser Applications)
Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física)
Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física)
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)

Date:	2016
Abstract:	Periodic ripple and nanoripple patterns are formed at the surface of amorphous steel after femtosecond pulsed laser irradiation (FSPLI). Formation of such ripples is accompanied with the emergence of a surface ferromagnetic behavior which is not initially present in the non-irradiated amorphous steel. The occurrence of ferromagnetic properties is associated with the laser-induced devitrification of the glassy structure to form ferromagnetic (α-Fe and Fe₃C) and ferrimagnetic [(Fe,Mn)₃O₄ and Fe₂CrO4] phases located in the ripples. The generation of magnetic structures by FSPLI turns out to be one of the fastest ways to induce magnetic patterning without the need of any shadow mask. Furthermore, local variations of the adhesion force, wettability and nanomechanical properties are also observed and compared to those of the as-cast amorphous alloy. These effects are of interest for applications (e. g. , biological, magnetic recording, etc. ) where both ferromagnetism and tribological/adhesion properties act synergistically to optimize material performance.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1015 Ministerio de Economía y Competitividad MAT2014-57960-C3-1-R Ministerio de Economía y Competitividad MAT2014-57960-C3-2-R Ministerio de Economía y Competitividad RYC-2012-10839
Rights:	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.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Femtosecond pulsed laser irradiation ; Amorphous steel ; Magnetic patterning ; Surface ripples ; Adhesion force ; Wettability
Published in:	Applied surface science, Vol. 371 (May 2016) , p. 399-406, ISSN 0169-4332

DOI: 10.1016/j.apsusc.2016.03.011

Post-print 26 p, 1.9 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group of Smart Nanoengineered Materials, Nanomechanics and Nanomagnetism (Gnm3)
Articles > Research articles
Articles > Published articles