Antiferromagnetic coupling and enhanced magnetization in all-ferromagnetic superlattices

Abstract

The structural and magnetic properties of a series of superlattices consisting of two ferromagnetic metals La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ (LSMO) and SrRuO${}_3$ (SRO) grown on (001) oriented SrTiO${}_3$ are studied. Superlattices with a fixed LSMO layer thickness of 20 unit cells (u.c.) and varying SRO layer thickness show a sudden drop in magnetization on cooling through temperature where both LSMO and SRO layers are ferromagnetic. This behavior suggests an antiferromagnetic coupling between the layers. In addition, the samples having thinner SRO layers (n \TEXTsymbol{<} 6) exhibit enhanced saturation magnetization at 10 K. These observations are attributed to the possible modification in the stereochemistry of the Ru and Mn ions in the interfacial region.

To be published in Applied Physics Letters

References in corpus (5)

• Positive exchange bias in ferromagnetic La0.67Sr0.33MnO3 / SrRuO3 bilayers
• Oscillatory Exchange Coupling and Positive Magnetoresistance in Epitaxial Oxide Heterostructures
• Direct observation of pinned/biased moments in magnetic superlattices
• Anisotropic pinned/biased magnetization in $SrRu{O}_3/SrMn{O}_3$ superlattices
• Ferromagnetism and metal-like transport in antiferromagnetic insulator heterostructures

Cited by in corpus (10)

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• Periodicity-dependence of the ferroelectric properties in BiFeO3/SrTiO3 multiferroic superlattices
• Anisotropic magnetocaloric effect in all-ferromagnetic (La0.7Sr0.3MnO3/SrRuO3) superlattices
• Strain dependence of antiferromagnetic interface coupling in La0.7Sr0.3MnO3/SrRuO3 superlattices
• Materials challenges for SrRuO3: from conventional to quantum electronics
• Magnetic Properties of Pr0.7Ca0.3MnO3/SrRuO3 Superlattices
• Raman spectra and Magnetization of all-ferromagnetic superlattices grown on (110) oriented SrTiO3
• Orthorhombic to tetragonal transition of SrRuO3 layers in Pr0.7Ca0.3MnO3/SrRuO3 superlattices
• Magnetic proximity effect at interface between a cuprate superconductor and an oxide spin valve
• Magnetic domain wall motion in SrRuO${}_3$ thin films