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Control of the magnetic properties of thin films through 2D nanopatterning

AuthorsCastán-Guerrero, C.; Herrero-Albillos, Julia; Sesé Monclús, Javier ; Bartolomé, Juan; Bartolomé, Fernando; Kronast, Florian; Rodríguez, Luis A.; Magén, César ; Merazzo, K. J. ; Vázquez Villalabeitia, Manuel ; Strichovanec, Pavel; Vavassori, Paolo; Hierro-Rodríguez, A. ; Valdés-Bango, F. ; Martín, José Ignacio ; Alameda, J. M. ; García, L. M.
Issue Date2013
PublisherUniversidad Pedagógica y Tecnológica de Colombia
Citation21th Latin American Symposium on Solid State Physics (2013)
AbstractNanopatterning techniques have opened a door to the otherwise hardly achievable control of magnetic properties of thin films. Antidot arrays, i.e. arrays of nonmagnetic inclusions or holes, act as periodic pinning centers for domain walls, which is the key to control the magnetization switching process. On the one hand, coercivity can be tailored as a function of the edge-to-edge hole separation. A series of antidot arrays has been fabricated by FIB etching, with nanometric diameter and varying the periodicity from the diluted regime to the percolation limit. Magnetic characterization by MOKE and XPEEM images show a crossover in the magnetic properties around the percolation limit. On the other hand, an asymmetric pinning potential can be induced by fabricating antidots with asymmetric shape, which leads to an asymmetric movement of domain walls. In this case, A Kerr effect microscope has been used for the magnetic imaging.
DescriptionResumen del trabajo presentado al "21th Latin American Symposium on Solid State Physics" celebrado en Villa de Leyva (Colombia) del 30 de septiembre al 4 de octubre de 2013.
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