[14p-A31-1~16] 6.3 Oxide electronics

△ [14p-A31-16] Electric Field Modulation of Anomalous and Topological Hall Effects in SrIrO₃ / SrRuO₃ Heterostructures

〇(D)Yuki Ohuchi¹, Jobu Matsuno², Naoki Ogawa², Yusuke Kozuka¹, Masaki Uchida¹, Yoshinori Tokura^1,2, Masashi Kawasaki^1,2 (1.Dept. of Appl. Phys.,the Univ. of Tokyo, 2.RIKEN CEMS)

Keywords:skyrmion

Electric field control of magnetic properties is one of the key technologies in spintronics. Magnetic skyrmion, which is topologically nontrivial local spin texture, has become a new candidate of a spintronic information carrier. The ways of driving, creating and deleting it have been the subjects of extensive studies, while most of them have been devoted to chiral magnets such as B20-type metal compounds with inversion asymmetric crystal structures. This asymmetry gives rise to Dzyaloshinskii-Moriya (DM) interaction, which plays a crucial role in forming skyrmion as well as ferromagnetic interaction. On the other hand, it has been suggested that skyrmion can be induced even in symmetric ferromagnets by artificially introducing asymmetry at the hetero-interface with strong spin-orbit interaction materials. Recently, emergence of skyrmion has been reported in oxide heterostructures composed of SrRuO₃ and SrIrO₃, where SrRuO₃ is a ferromagnetic metal and SrIrO₃ is a non-magnetic metal with strong spin-orbit interaction due to Ir⁴⁺. Here we examine the electric field effect on the anomalous and topological Hall effects for the heterostructure of SrTiO₃(substrate) / SrIrO₃ / SrRuO₃.