Tailoring spin-orbit interactions and Coulomb repulsion are the key features to observe exotic physical phenomena such as magnetic anisotropy and topological spin texture at oxide interfaces. Our study proposes a novel platform for engineering the magnetism and spin-orbit coupling at LaMnO3/SrIrO3 (3d-5d oxide) interfaces by tuning the LaMnO3 growth conditions which controls the lattice displacement and spin-correlated interfacial coupling through charge transfer. We report on a tunable and enhanced interface-induced Rashba spin-orbit coupling and Elliot-Yafet spin relaxation mechanism in LaMnO3/SrIrO3 bilayer with change in the underlying magnetic order of LaMnO3. We also observed enhanced spin-orbit coupling strength in LaMnO3/SrIrO3 compared to previously reported SrIrO3 layers. The X-Ray spectroscopy measurement reveals the quantitative valence of Mn and their impact on charge transfer. Further, we performed angle-dependent magnetoresistance measurements, which show signatures of magnetic proximity effect in SrIrO3 while reflecting the magnetic order of LaMnO3. Our work thus demonstrates a new route to engineer the interface induced Rashba spin-orbit coupling and magnetic proximity effect in 3d-5d oxide interfaces which makes SrIrO3 an ideal candidate for spintronics applications.
@article{arxiv.2004.00800,
title = {Tunable and Enhanced Rashba Spin-Orbit Coupling in Iridate-Manganite Heterostructures},
author = {T. S. Suraj and Ganesh Ji Omar and Hariom Jani and Muhammad Mangattuchali Juvaid and Sonu Hooda and Anindita Chaudhuri and Andrivo Rusydi and Kanikrishnan Sethupathi and Thirumalai Venkatesan and Ariando Ariando and Mamidanna Sri Ramachandra Rao},
journal= {arXiv preprint arXiv:2004.00800},
year = {2020}
}