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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 Vaz1,2, Michael Förster1, Jan Rhensius2,3,4, Andrè Bisig2,4,8, Phillip Wolhüter2,4, Sebastian Schweitzer4, Jakoba Heidler2, Helmut Körner2,4, Andrea Locatelli5, Miguel Niño5, Markus Weigand6, Laurence Méchin7, Fabien Gaucher7, Eberhard Goering8, Souliman Moussaoui9, Frithjof Nolting9, Laura Heyderman3, and Mathias Kläui11Institut 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.

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DPG-Physik > DPG-Verhandlungen > 2012 > Berlin