Sub-micron magnetic patterns and local variations of adhesion force induced in non-ferromagnetic amorphous steel by femtosecond pulsed laser irradiation

Autor: Jordi Sort, Yu-ping Feng, Huiyan Zhang, M O’connor Gerard, Clare McDaniel, Maria Dolors Baró, Eva Pellicer, Maria Teresa Flores-Arias, Daniel Nieto, Jordi Díaz-Marcos, Eva García-Lecina
Rok vydání: 2016
Předmět:
Materials science
nanoindentation
Ferromagnetic material properties
Amorphous steel
magnetic patterning
wettability
General Physics and Astronomy
Nanotechnology
02 engineering and technology
Adhesion force
010402 general chemistry
01 natural sciences
Surface ripples
amorphous steel
adhesion force
alloys
Ferrimagnetism
generation
Surface roughness
stainless-steel
Amorphous metal
surface ripples
Condensed matter physics
Magnetic patterning
femtosecond pulsed laser irradiation
Surfaces and Interfaces
General Chemistry
Adhesion
021001 nanoscience & nanotechnology
Condensed Matter Physics
ferromagnetism
vitrification
0104 chemical sciences
Surfaces
Coatings and Films
Amorphous solid
Devitrification
Femtosecond pulsed laser irradiation
Ferromagnetism
Wettability
surface-roughness
films
bulk metallic glasses
0210 nano-technology
ripples
Zdroj: Dipòsit Digital de Documents de la UAB
Universitat Autònoma de Barcelona
ISSN: 0169-4332
Popis: 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.
Databáze: OpenAIRE
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