Chiral Coupling between Magnetic Layers with Orthogonal Magnetization

Can Onur Avci; Charles-Henri Lambert; Giacomo Sala; Pietro Gambardella

doi:10.1103/PhysRevLett.127.167202

Chiral Coupling between Magnetic Layers with Orthogonal Magnetization

Mesoscale and Nanoscale Physics 2021-11-18 v1 Materials Science

Authors: Can Onur Avci , Charles-Henri Lambert , Giacomo Sala , Pietro Gambardella

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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.

Keywords

dzyaloshinskii-moriya interaction chirality-induced spin selectivity

Cite

@article{arxiv.2111.09197,
  title  = {Chiral Coupling between Magnetic Layers with Orthogonal Magnetization},
  author = {Can Onur Avci and Charles-Henri Lambert and Giacomo Sala and Pietro Gambardella},
  journal= {arXiv preprint arXiv:2111.09197},
  year   = {2021}
}

Chiral Coupling between Magnetic Layers with Orthogonal Magnetization

Abstract

Keywords

Cite

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