Stability and magnetic properties of Fe double layers on Ir (111)

Dupe M, Heinze S, Sinova J, Dupe B (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Physical Review B American Physical Society

Book Volume: 98

Article Number: 224415

Journal Issue: 22

DOI: 10.1103/PhysRevB.98.224415

Abstract

We investigate the interplay between the structural reconstruction and the magnetic properties of Fe double layers on Ir (111) substrate using first-principles calculations based on density functional theory and mapping of the total energies on an atomistic spin model. We show that if a second Fe monolayer is deposited on Fe/Ir (111), the stacking may change from hexagonal-close-packed to bcc (110)-like accompanied by a reduction of symmetry from trigonal to centered rectangular. Although the bcc-like surface has a lower coordination, we find that this is the structural ground state. This reconstruction has a major impact on the magnetic structure. We investigate in detail the changes in the magnetic exchange interaction, the magnetocrystalline anisotropy, and the Dzyaloshinskii-Moriya interaction depending on the stacking sequence of the Fe double layer. Based on our findings, we suggest a technique to engineer Dzyaloshinskii-Moriya interactions in multilayer systems employing symmetry considerations. The resulting anisotropic Dzyaloshinskii-Moriya interactions may stabilize higher-order skyrmions or antiskyrmions.

Involved external institutions

Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) Christian-Albrechts-Universität zu Kiel DE Germany (DE)

How to cite

APA:

Dupe, M., Heinze, S., Sinova, J., & Dupe, B. (2018). Stability and magnetic properties of Fe double layers on Ir (111). Physical Review B, 98(22). https://doi.org/10.1103/PhysRevB.98.224415

MLA:

Dupe, Melanie, et al. "Stability and magnetic properties of Fe double layers on Ir (111)." Physical Review B 98.22 (2018).

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