%0 Journal Article
%A Romera Rabasa, Miguel Álvaro
%A Grollier, Julie
%A Collin, Sophie
%A Devolder, Thibaut
%A Cros, Vincent
%A Muñoz, Manuel
%A Prieto, José Luis
%T Enhanced stability in spin transfer nanopillars due to a Fe/Gd/Fe trilayer
%D 2013
%@ 0003-6951
%U https://hdl.handle.net/20.500.14352/95478
%X A sharp antiferromagnetic boundary of Fe/Gd is found to affect notoriously the critical current for spin transfer torque (STT). Transport measurements performed on nano-patterned spin valves show that when a Fe/Gd/Fe is added as a top layer, the effect of spin transfer on the free layer is dramatically reduced. The critical current increases up to one order of magnitude at 10 K and five times at room temperature. We show that this increase cannot be fully explained by the macrospin approximation and we argue that it is due to a torque at the Gd/Fe interface that opposes the STT in the free layer.
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