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MA: Magnetismus
MA 20: Poster: Films(1-36) Transp(37-56) Ex.Bias(57-67) Spindyn(68-80) Micromag(81-95) Particle(96-109) Imag.+Surface(110-113) Spinelectr(114-122) Theory+Micromag(123-131) Spinstr+Aniso(132-142) MagMat(143-156) Meas(157,158) MolMag+Kondo(159-162) Postdead(163-)
MA 20.38: Poster
Tuesday, March 28, 2006, 15:15–19:15, P1
Current-assisted Domain Wall Depinning at Variable Temperatures — •M. Laufenberg1, D. Backes1,2, W. Bührer1, D. Bedau1, P.-E. Melchy1, M. Kläui1, U. Rüdiger1, C. A. F. Vaz3, J. A. C. Bland3, L. J. Heyderman2, F. Nolting2, S. Cherifi4, A. Locatelli4, S. Heun4, G. Faini5, and E. Cambril5 — 1Fachbereich Physik, Universität Konstanz, Germany — 2Paul Scherrer Institut, 5232 Villigen PSI, Switzerland — 3Cavendish Laboratory, University of Cambridge, UK — 4Sincrotrone Trieste, 34012 Basovizza, Trieste, Italy — 5Laboratoire de Photonique et de Nanostructures - CNRS, 91460 Marcoussis, France
The temperature dependence of domain wall spin structures and of current- and field-induced domain wall depinning has been studied in ferromagnetic nanostructures using magnetoresistance measurements and photoemission electron microscopy. Thermally activated transitions from transverse to vortex walls were observed [1]. The critical fields and currents for domain wall depinning were found to be dependent on temperature. The influence of Joule heating by the current [2] was studied quantitatively.
[1] M. Laufenberg, D. Backes, W. Bührer, D. Bedau, M. Kläui, U. Rüdiger, et al., submitted
[2] A. Yamaguchi et al., Appl. Phys. Lett. 86, 012511 (2005)