Interface magnetism and anomalous Hall effect in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi mathvariant="normal">La</mml:mi> <mml:mrow> <mml:mn>0.7</mml:mn> </mml:mrow> </mml:msub> <mml:msub> <mml:mi mathvariant="normal">Sr</mml:mi> <mml:mrow> <mml:mn>0.3</mml:mn> </mml:mrow> </mml:msub> <mml:mi>Mn</mml:mi> <mml:msub> <mml:mi mathvariant="normal">O</mml:mi> <mml:mn>3</mml:mn> </mml:msub> </mml:mrow> <mml:mo>/</mml:mo> <mml:mrow> <mml:mi>SrIr</mml:mi> <mml:msub> <mml:mi mathvariant="normal">O</mml:mi> <mml:mn>3</mml:mn> </mml:msub> </mml:mrow> </mml:math> bilayers

Abstract

Epitaxial interfaces combining 3d and 5d transition metal oxides are a fertile playground to examine the interplay between topology and electron correlations. In this paper, we explore magnetism and transport of bilayers combining ferromagnetic La0.7⁢Sr0.3⁢Mn⁢O3 and the strong spin-orbit coupling material SrIr⁢O3. We have found an interfacial magnetic proximity effect driving an intrinsic contribution to the anomalous Hall effect of topological origin. The interfacial proximity interaction is enabled by the Mn-O-Ir bonding reconstruction and depends on layer sequence. While bilayers with the La0.7⁢Sr0.3⁢Mn⁢O3 on top featuring a robust Mn magnetism at the interface show the intrinsic AHE contribution, it is absent in bilayers with the inverted layer sequence (SrIr⁢O3 layer on top) showing strongly suppressed magnetism at the interface. These results illustrate the leading role of interfacial atomic reconstructions on the interplay between topology and correlations at 3d/5d oxide interfaces. This finding may be of interest in future oxide topological spintronics and spin-orbitronics.