  The 5d iridium-based transition metal oxides have gained broad interest
because of their strong spin-orbit coupling which favors new or exotic quantum
electronic states. On the other hand, they rarely exhibit more mainstream
orders like ferromagnetism due to generally weak electron-electron correlation
strength. Here, we show a proximity-induced ferromagnetic (FM) state with TC =
100 K and strong magnetocrystalline anisotropy in a SrIrO3 (SIO)
heterostructure via interfacial charge transfer by using a ferromagnetic
insulator in contact with SIO. Electrical transport allows to selectively probe
the FM state of the SIO layer and the direct observation of a strong, intrinsic
and positive anomalous Hall effect (AHE). For T < 20 K, the AHE displays
unusually large coercive and saturation field, a fingerprint of a strong
pseudospin-lattice coupling. A Hall angle, sxyAHE/sxx, larger by an order of
magnitude than in typical 3d metals and a FM net moment of about 0.1 mB/Ir, is
reported. This emphasizes how efficiently the nontrivial topological band
properties of SIO can be manipulated by structural modifications and the
exchange interaction with 3d TMOs.
