DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2014 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

TT: Fachverband Tiefe Temperaturen

TT 75: Focus Session: Spin-Orbit Torque at Surfaces and Interfaces (organized by MA)

TT 75.1: Topical Talk

Wednesday, April 2, 2014, 15:00–15:30, BEY 118

Magnetization switching and spin-orbit torques in AlOx/Co/Pt and MgO/CoFeB/Ta layers — •Pietro Gambardella — Department of Materials, ETH Zurich

Spin-orbit torques induced by spin Hall and Rashba-like effects in heavy metal/ferromagnetic bilayers allow for magnetization switching based on in-plane current injection. Using this geometry, we demonstrate deterministic magnetization reversal induced by sub-ns current pulses in 100 to 200 nm sized dots and discuss the switching efficiency as a function of pulse duration. Further, we present vector measurements of the longitudinal and transverse spin-orbit torques in AlOx/Co/Pt and MgO/CoFeB/Ta trilayers using harmonic analysis of the anomalous and planar Hall effects, providing evidence for strongly anisotropic field-like and spin transfer-like components that are compatible with the symmetry of the trilayers. The switching efficiency and relative magnitude of the longitudinal and transverse torques are analyzed in annealed MgO/CoFeB/Ta trilayers as a function of magnetization, magnetic anisotropy, and resistivity.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2014 > Dresden