Band filling effects on the emergence of magnetic skyrmions: Pd/Fe and Pd/Co bilayers on Ir(111)

Abstract

Structurally similar transition metal systems can have widely differing magnetic properties. A prime example of this is found for bilayers on Ir(111), where Pd/Fe/Ir(111) ground state has a well-established noncollinear spin texture, while Pd/Co/Ir(111) present a ferromagnetic (FM) single-domain. To unravel the origins of these different magnetic behaviors, an investigation of Pd/Fe and Pd/Co bilayers on Ir(111), is here performed. Based on the obtained \textit{ab-initio} electronic structure, exchange coupling parameters ($J_{ij}$) and Dzyaloshinskii-Moriya interactions (DMI), we demonstrate that, although in Pd/Co/Ir(111) the DMI is significant, two ingredients play a key role on the origin of noncollinearity in Pd/Fe/Ir(111): the presence of magnetic frustrations and a much more in-plane DMI, both with a long-range influence. The $J_{ij}$ and DMI behaviors in both systems can be explained in terms of a simple rigid-band-like model. Also, by performing spin-dynamics simulations with the magnetic parameters tuned from the Pd/Co/Ir(111) to Pd/Fe/Ir(111) \textit{ab-initio} values, we could find conditions for the emergence of skyrmionic phases in the originally FM Pd/Co/Ir(111).

References in corpus (18)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
• The 2020 Skyrmionics Roadmap
• Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interfaces
• Manipulation of Dzyaloshinskii-Moriya interaction in Co/Pt multilayers with strain
• First-principles prediction of high Curie temperature for ferromagnetic bcc-Co and bcc-FeCo alloys and its relevance to tunneling magnetoresistance
• Formation of magnetic skyrmions with tunable properties in PdFe bilayer deposited on Ir(111)
• Parity effect in ground state localization of antiferromagnetic chains coupled to a ferromagnet
• First-principles Dzyaloshinskii-Moriya interaction in a non-collinear framework
• Theory of non-collinear interactions beyond Heisenberg exchange; applications to bcc Fe
• Dzyaloshinskii-Moriya interaction induced by an ultrashort electromagnetic pulse: Application to coherent (anti)ferromagnetic skyrmion nucleation
• Mechanisms behind large Gilbert damping anisotropies
• Zero-field skyrmionic states and in-field edge-skyrmions induced by boundary tuning
• Trends of higher-order exchange interactions in transition-metal trilayers
• Density functional perturbation theory for lattice dynamics with fully relativistic ultrasoft pseudopotentials: the magnetic case
• Electric-field control of the exchange interactions

Cited by in corpus (4)

• Engineering skyrmion from spin spiral in transition metal multilayers
• Metaheuristic conditional neural network for harvesting skyrmionic metastable states
• Genetic-tunneling driven energy optimizer for spin systems
• Design of 2D Skyrmionic Metamaterial Through Controlled Assembly