Direct observation of pinned/biased moments in magnetic superlattices

Abstract

We report the \QTR{it}{pinned/biased} \QTR{it}{moment} in the superlattices consisting of ferromagnetic (FM) SrRuO${}_3$ and antiferromgnetic (AFM) SrMnO${}_3$. This superlattice system shows anisotropy and oriented pinning/biasing in the field-cooled (FC) hysteresis loop. The in-plane cooling-field provides antiferromagnetic orientations while out-of-plane cooling-field provides ferromagnetic orientations to the pinned/biased moments. The spacer layer thickness, strength and orientation of magnetic field, cooling field, and driving current influence the pinning strength. We propose that the magnetic structure is a repetition of $AFM/Pin/FM$($Free$)/$Pin$ unit below a critical field to explain its magnetic and transport properties. The transport behavior is discussed using the spin-dependent conduction.

arXiv commentto be published in Physical Review B

References in corpus (2)

• Measurements of Spin Polarization of Epitaxial SrRuO3 Thin Films
• Interfacial strain measurements in $SrRu{O}_3/SrMn{O}_3$ magnetic multilayers

Cited by in corpus (5)

• Exchange bias driven by the Dzyaloshinskii-Moriya interaction and ferroelectric polarization at G-type antiferromagnetic perovskite interfaces
• Antiferromagnetic coupling and enhanced magnetization in all-ferromagnetic superlattices
• Ab Initio Study of the Intrinsic Exchange Bias at the SrRuO${}_3$/SrMnO${}_3$ Interface
• Effect of electric/magnetic field on pinned/biased moments at the interfaces of magnetic superlattices
• Anomalous exchange coupling in transition-metal-oxide based superlattices with antiferromagnetic spacer layers