Growth-sequence-dependent interface magnetism of SrIrO${}_3$ - La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ bilayers

Abstract

Bilayers of the oxide 3d ferromagnet La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ (LSMO) and the 5d paramagnet SrIrO${}_3$ (SIO) with large spin-orbit coupling (SOC) have been investigated regarding the impact of interfacial SOC on magnetic order. For the growth sequence of LSMO on SIO, ferromagnetism is strongly altered and large out-of-plane-canted anisotropy associated with lacking magnetic saturation up to 4 T has been observed. Thin bilayer films have been grown coherently in both growth sequences on SrTiO${}_3$ (001) by pulsed laser deposition and structurally characterized by scanning transmission electron microscopy (STEM) and x-ray diffraction (XRD). Measurements of magnetization and field-dependent Mn L${}_{2,3}$ edge x-ray magnetic circular dichroism (XMCD) reveal changes of LSMO magnetic order which are strong in LSMO on SIO and weak in LSMO underneath of SIO. We attribute the impact of the growth sequence to the interfacial lattice structure/symmetry which is known to influence the interfacial magnetic coupling.

References in corpus (9)

• Emerging magnetism and anomalous Hall effect in iridate-manganite heterostructures
• Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces
• Optimized fabrication of high quality La0.67Sr0.33MnO3 thin films considering all essential characteristics
• Anisotropic spin-orbit torque generation in epitaxial SrIrO3 by symmetry design
• Dimensionality-driven metal-insulator-transition in spin-orbit coupled SrIrO${}_3$
• Electronic and Spin States of SrRuO3 Thin Films: an X-ray Magnetic Circular Dichroism Study
• Growth and engineering of perovskite SrIrO3 thin films
• Ab Initio Study of the Intrinsic Exchange Bias at the SrRuO${}_3$/SrMnO${}_3$ Interface
• Novel spin-orbit coupling driven emergent states in iridate-based heterostructures