Magnetic exchange coupling in Fe/bilayer-manganites heterostructure

Magnetic exchange couplings among perovskite manganese oxide heterostructures (typified by SrRuO3/La0.3Sr0.7MnO3) have been widely studied as potential components of metal-oxide spintronic devices, while bi-layered manganite related magnetic coupling phenomenon has never been reported. In this work, we find an obvious enhancement of coercivity in Fe/La2-2xSr1+2xMn2O7(x=0.35, B-LSMO) starting at the transition temperature of B-LSMO single crystal. Systematic analysis on the temperature and external field evolution of magnetization reversal behavior reveals the emergence of antiferromagnetic interfacial exchange coupling between Fe and B-LSMO. Our results shed new light on tuning of magnetic property on layered oxide interface and designing novel spintronic devices. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study reveals a significant enhancement of coercivity in Fe/La2-2xSr1+2xMn2O7 (x=0.35, B-LSMO), attributed to the emergence of antiferromagnetic interfacial exchange coupling between Fe and B-LSMO. This sheds new light on tuning magnetic properties at layered oxide interfaces and designing novel spintronic devices.