2018 - Sustainable Industrial Processing Summit & Exhibition
4-7 November 2018, Rio Othon Palace, Rio De Janeiro, Brazil
Seven Nobel Laureates have already confirmed their attendance: Prof. Dan Shechtman, Prof. Sir Fraser Stoddart, Prof. Andre Geim, Prof. Thomas Steitz, Prof. Ada Yonath, Prof. Kurt Wüthrich and Prof. Ferid Murad. More than 400 Abstracts Submitted from about 60 Countries.
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    Using Femtosecond Pulsed Laser Irradiation (FSPLI) to Magnetically Pattern the Surface of Non-ferromagnetic Amorphous Steel
    Maria Dolores Baró1; Huiyan Zhang2; Yuping Feng1; Santiago Surinyach1; Eva Pellicer1; Jordi Sort1;
    1UNIVERSITAT AUTòNOMA DE BARCELONA, Bellaterra, Spain; 2DEPARTAMENT DE FISICA, UAB, Bellaterra, Spain;
    PAPER: 362/SISAM/Invited (Oral)
    SCHEDULED: 15:15/Tue./Copacabana A (150/1st)



    ABSTRACT:
    Periodic ripple and nanoripple patterns are generated at the surface of amorphous steel after femtosecond pulsed laser irradiation (FSPLI). Formation of such ripples is accompanied by the emergence of a surface ferromagnetic behavior, which is not initially present in the non-irradiated amorphous steel. The occurrence of ferromagnetic properties is due to the FSPLI-induced surface devitrification of the glassy structure to form ferromagnetic (a-Fe and Fe<sub>3</sub>C) and ferrimagnetic [(Fe,Mn)<sub>3</sub>O<sub>4</sub> and Fe<sub>2</sub>CrO<sub>4</sub>] 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, the adhesion force, wettability and nanomechanical properties of the surface treated by FSPLI are also studied and compared to those of the as-cast amorphous alloy. These effects are of interest for applications (e.g., biological, magnetic recording, etc.).