Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 44: Magnetic imaging (Experimental techniques)
MA 44.6: Vortrag
Donnerstag, 4. April 2019, 10:45–11:00, H53
Soft X ray magnetic tomography — Aurelio Hierro-Rodriguez1, •Carlos Quiros2, Andrea Sorrentino3, Ricardo Valcarcel3, Luis M Alvarez Prado2, Jose Ignacio Martin2, Jose M Alameda2, Stephen McVitie1, Eva Pereiro3, Maria Velez2, and Salvador Ferrer3 — 1School of Physics and Astronomy University of Glasgow G12 8QQ, Glasgow (UK) — 2Departamento de Fisica, Universidad de Oviedo, 33007 Oviedo, Spain — 3ALBA Synchrotron, 08290 Cerdanyola del Valles, Spain
Soft X ray transmission microscopy with circularly polarized photons tuned at specific resonant energies allows to image magnetic textures by exploiting the dichroic absorption contrast which depends on the angle of the magnetization and X ray beam. Changing their relative orientations allows determining the orientation of the magnetization of the sample [1]. We have recently developed 3D magnetic reconstruction tomography [2] which allows to reconstruct the magnetization at ~ 30 nm resolution and to localize magnetic singularities in thin films (thickness up to ~300 nm) . These results will be illustrated in a permalloy/NdCo/permalloy trilayer where magnetic bifurcations at the top and bottom permalloy layers are clearly separated. Our method is well suited for identifiying buried magnetic features in multilayers.
1.- C. Blanco-Roldan et al.,Nat Comm. (2015) DOI: 10.1038/ncomms9196 2.- A. Hierro-Rodriguez, J. Synchrotron Rad.(2018)24, 1144