Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 108: Spin-Dependent Transport Phenomena II (organized by MA)

TT 108.4: Vortrag

Donnerstag, 19. März 2015, 15:45–16:00, H 0112

Current Induced Domain Wall Depinning in Non-Local Spin Valve Half Ring Structures — •Alexander Pfeiffer¹, William Savero Torres², Nils Richter¹, Laurent Vila², Jean Philippe Attané², and Mathias Kläui¹ — ¹Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany — ²Institut Nanosciences et Cryogénie, Université Grenoble Alpes & CEA, France

We demonstrate current induced domain wall depinning and phase transitions in non-local spin valve Permalloy/Aluminium half ring structures. With our optimized geometry by patterning a notch acting as a pinning center in one half ring, we are to able study the influence of Oersted fields, Joule heating and the spin transfer torque. We find a complete depinning event at zero applied external field for a charge current density of 600 GA/m^2, showing that our geometry can be used for low power domain wall manipulation.