Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 8: Spin Excitations and Spin Torque

MA 8.10: Vortrag

Montag, 11. März 2013, 12:00–12:15, H23

Current induced domain wall nucleation and motion in an out-of-plane magnetized CoFeB-MgO nanowire — •Tomek Schulz¹, Tim Zacke¹, Su-Jung Noh¹, Berthold Ocker², Capuciné Burrowes³, Dafiné Ravelsona³, and Mathias Kläui¹ — ¹Instute of Physics, Johannes Gutenberg-Universität Mainz, Germany — ²Singulus Technologies AG, Kahl am Main, Germany — ³Institut d'Electronique Fondamentale, Universite Paris-sud, France

For read-out of a racetrack device, an appropriate material compositions that is compatible with high TMR MgO barriers has been developed. We report on transport measurements on a magnetic nanowire structure consisting of a Ta/CoFeB/MgO/Ta-multilayer with a perpendicular magnetization anisotropy. By applying single short current pulses through a gold wire on top of the nanowire it is possible to nucleate domain walls only by the generated Oersted field. After the nucleation, we investigated the properties of this multilayer stack for current induced domain wall motion and found very low propagation fields.