Chiral Coupling between Magnetic Layers with Orthogonal Magnetization

Abstract

We report on the occurrence of strong interlayer Dzyaloshinskii-Moriya interaction (DMI) between an in-plane magnetized Co layer and a perpendicularly magnetized TbFe layer through a Pt spacer. The DMI causes a chiral coupling that favors one-handed orthogonal magnetic configurations of Co and TbFe, which we reveal through Hall effect and magnetoresistance measurements. The DMI coupling mediated by Pt causes effective magnetic fields on either layer of up to 10-15 mT, which decrease monotonously with increasing Pt thickness. Ru, Ta, and Ti spacers mediate a significantly smaller coupling compared to Pt, highlighting the essential role of Pt in inducing the interlayer DMI. These results are relevant to understand and maximize the interlayer coupling induced by the DMI as well as to design spintronic devices with chiral spin textures.

References in corpus (3)

• Interfacial Dzyaloshinskii-Moriya interaction in perpendicularly-magnetized Pt/Co/AlO${}_x$ ultrathin films measured by Brillouin light spectroscopy
• Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interfaces
• Synthetic chiral magnets promoted by the Dzyaloshinskii-Moriya interaction

Cited by in corpus (14)

• Chirality as Generalized Spin-Orbit Interaction in Spintronics
• Field-free spin-orbit torque switching enabled by interlayer Dzyaloshinskii-Moriya interaction
• Growth-dependent Interlayer Chiral Exchange and Field-free Switching
• Field-Free Switching in Symmetry Breaking Multilayers: The Critical Role of Interlayer Chiral Exchange
• Observation of spin-wave moiré edge and cavity modes in twisted magnetic lattices
• Strong lateral exchange coupling and current-induced switching in single-layer ferrimagnetic films with patterned compensation temperature
• Delving into the anisotropic interlayer exchange in bilayer CrI${}_3$
• Linear Enhancement of Spin-Orbit Torques and Absence of Bulk Rashba-Type Spin Splitting in Perpendicularly Magnetized [Pt/Co/W]n Superlattices
• Intrinsic chiral field as vector potential of the magnetic current in the zig-zag lattice of magnetic dipoles
• Observation and formation mechanism of 360° domain wall rings in Synthetic Anti-Ferromagnets with interlayer chiral interactions
• Generic role of the Dzyaloshinskii-Moriya interaction in nanocrystalline ferromagnets
• Dzyaloshinskii-Moriya spin density by skew scattering
• Interlayer Dzyaloshinskii-Moriya interactions induced via non-linear phononics in bilayer van der Waals materials
• Antisymmetric interlayer exchange coupling spontaneously built in synthetic antiferromagnetic structure by film growth