Interface morphology effect on the spin mixing conductance of Pt/Fe₃O₄ bilayers.

ABSTRACT: Non-magnetic (NM) metals with strong spin-orbit coupling have been recently explored as a probe of interface magnetism on ferromagnetic insulators (FMI) by means of the spin Hall magnetoresistance (SMR) effect. In NM/FMI heterostructures, increasing the spin mixing conductance (SMC) at the interface comes as an important step towards devices with maximized SMR. Here we report on the study of SMR in Pt/Fe₃O₄ bilayers at cryogenic temperature, and identify a strong dependence of the determined real part of the complex SMC on the interface roughness. We tune the roughness of the Pt/Fe₃O₄ interface by controlling the growth conditions of the Fe₃O₄ films, namely by varying the thickness, growth technique, and post-annealing proce

SUBMITTER: Pham TKH 

PROVIDER: S-EPMC6141513 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature