The spin to charge current conversion (SCCC) due to spin-orbit coupling (SOC) opens the way to manipulate the magnetization by electrical means. SCCC results either from bulk effects, in particular through Spin Hall Effect (SHE) [1-3], or from interfacial effects, for example in our recent experimental discovery of Rashba-Edelstein Effect (REE) . We have investigated the SCCC by SHE in metals such as Pt [1,2], Au and AuW . In the case of 2D systems, we recently demonstrated a large SCCC efficiency in Rashba type Ag/Bi interface . An even larger effect can be even anticipated if topological insulators are used.
We will present a practical application of this SCCC to control the magnetization due to the spin-orbit torque induced by SHE [5-8], and focus on the case of Pt/(Co/Ni)3/Al multilayers with perpendicular magnetization. Using both the anomalous Hall Effect and Kerr experiments in patterned Hall bars, we are able to establish a scenario for the reversal mechanism involving domain wall motions and spin-orbit torques induced by SHE in Pt.
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