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 mathv

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 <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:mrow> <a:msub> <a:mi mathvariant="normal">La</a:mi> <a:mrow> <a:mn>0.7</a:mn> </a:mrow> </a:msub> <a:msub> <a:mi mathvariant="normal">Sr</a:mi> <a:mrow> <a:mn>0.3</a:mn> </a:mrow> </a:msub> <a:mi>Mn</a:mi> <a:msub> <a:mi mathvariant="normal">O</a:mi> <a:mn>3</a:mn> </a:msub> </a:mrow> </a:math> and the strong spin-orbit coupling material <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"> <e:mrow> <e:mi>SrIr</e:mi> <e:msub> <e:mi mathvariant="normal">O</e:mi> <e:mn>3</e:mn> </e:msub> </e:mrow> </e:math> . 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 <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"> <g:mrow> <g:msub> <g:mi mathvariant="normal">La</g:mi> <g:mrow> <g:mn>0.7</g:mn> </g:mrow> </g:msub> <g:msub> <g:mi mathvariant="normal">Sr</g:mi> <g:mrow> <g:mn>0.3</g:mn> </g:mrow> </g:msub> <g:mi>Mn</g:mi> <g:msub> <g:mi mathvariant="normal">O</g:mi> <g:mn>3</g:mn> </g:msub> </g:mrow> </g:math> 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 ( <k:math xmlns:k="http://www.w3.org/1998/Math/MathML"> <k:mrow> <k:mi>SrIr</k:mi> <k:msub> <k:mi mathvariant="normal">O</k:mi> <k:mn>3</k:mn> </k:msub> </k:mrow> </k:math> 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.