Ferromagnetic Ordering in Rashba Superconductive LaAl0.7Mn0.3O3/SrTiO3 Interface.

The combination of ferromagnetism, superconductivity, and spin-orbit coupling in interfacial two-dimensional electron liquids (2DELs) assembles the essential ingredients for realizing tantalized topological or spin polarized superconductivity for interfacial oxitronics. Unfortunately, these ingredients usually compete and are sometimes mutually exclusive. Here, by optimally designing a ferromagnet/superconductor heterostructure (LaAl0.7Mn0.3O3/SrTiO3), we demonstrate a ferromagnetic 2DEL with strong Rashba spin-orbit coupling and typical superconducting behavior. More excitingly, Rashba spin-orbit coupling and ferromagnetic order were found to coexist according to the observation of weak antilocalization and butterfly shaped magnetoresistance with clear hysteresis during the superconducting transition. Our revealed coexistence of ferromagnetism, superconductivity, and spin-orbit coupling at the oxide interface provides a fruitful platform to investigate nontrivial properties of spin-polarized supercurrent/topological superconductors and to cultivate applications for superconducting spintronics/quantum computation.