Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MA: Fachverband Magnetismus

MA 4: Spin-dependent Transport Phenomena

MA 4.8: Vortrag

Montag, 26. März 2012, 11:30–11:45, H 1012

Static and dynamic properties of magnetic domain configurations in patterned La0.7Sr0.3MnO3 nanostructures — •Luís Peña¹, Carlos Vaz^1,2, Michael Förster¹, Jan Rhensius^2,3,4, Andrè Bisig^2,4,8, Phillip Wolhüter^2,4, Sebastian Schweitzer⁴, Jakoba Heidler², Helmut Körner^2,4, Andrea Locatelli⁵, Miguel Niño⁵, Markus Weigand⁶, Laurence Méchin⁷, Fabien Gaucher⁷, Eberhard Goering⁸, Souliman Moussaoui⁹, Frithjof Nolting⁹, Laura Heyderman³, and Mathias Kläui¹ — ¹Institut für Physik, JGU Mainz, Staudingerweg 7, D-55128 — ²SwissFEL, PSI, CH-5232 — ³Lab. for Micro- and Nanotech., PSI, CH-5232 — ⁴Fachbereich Physik, Univ. Konstanz, Universitätsstraβe 10, D-78457 — ⁵Sincrotrone Trieste, I-34149 — ⁶HZB für Mater. und Energ. GmbH,D-12489 — ⁷GREYC, 6 Blvd. du Maréchal Juin,FR-14050 — ⁸Max-Plancx-Instute for Intelligent System, Heisenbergstrasse 3, D-70569 — ⁹SLS-PSI, CH-5232

The static magnetic domain configuration in square- and ring-shape structures is investigated by direct high-resolution x-ray magnetic microscopy as a function of temperature and geometrical parameters. We show that the magnetic configurations evolve from multidomain to flux-closure states with decreasing element size, with a thickness-dependent crossover at the micrometric scale. The flux-closure states are stable against thermal excitations up to near the Curie temperature. Through magnetotransport experiments on half-ring structures we investigate the dynamic properties of transversal domain wall depinning by current pulse injection.