Spin-orbit torques originating from bulk and interface in Pt-based structures.
作者： Kazuya Ando , Hiroto Sakimura , Hiroki Hayashi , Akira Musha
DOI: 10.1103/PHYSREVRESEARCH.3.013042
关键词: Spin Hall effect 、 Coupling 、 Ferromagnetism 、 Electronic structure 、 Bilayer 、 Spin (physics) 、 Conductance 、 Materials science 、 Spintronics 、 Condensed matter physics
摘要: We investigated spin-orbit torques in prototypical Pt-based spintronic devices. found that, Pt/Ni and Pt/Fe bilayers, the damping-like torque efficiency depends on thickness of Pt layer. also that is almost identical bilayers despite stronger spin memory loss at interface. These results suggest although dominant source bulk Hall effect layer, a sizable generated by interface bilayer due to interfacial coupling. In contrast torque, whose magnitude sign are field-like strongly choice ferromagnetic The originating from layer opposite between which can be attributed imaginary part spin-mixing conductance. demonstrate quite sensitive electronic structure FM
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