Interfacial Dzyaloshinskii–Moriya interaction in the epitaxial W/Co/Pt multilayers

Jena, Sukanta Kumar; Islam, Rajibul; Milińska, E.; Jakubowski, M.; Minikayev, R.; Lewińska, S.; Lynnyk, Artem; Pietruczik, A.; Aleszkiewicz, P.; Autieri, Carmine; Wawro, A.

doi:10.1039/d0nr08594d

Cited by 17 publications

(6 citation statements)

References 42 publications

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“…As a result, the iDMI amplitude decreses with decreasing the Ms value at the same thickness but different Au concentrations of Co1-xAux alloy. Here, in our case of epitaxial samples and sharp interfaces, the strength of 𝐷 Xss and 𝐷 6 are higher compared to the sputtered amorphous and multi-crystalline trilayers found in literatures 22,24,25 .…”

Section: Resultscontrasting

confidence: 45%

“…The iDMI constant for pure Co (sample S1), 𝐷 6 = 2.62 pJ/m, is higher than that for W/Co/Pt (𝐷 6 = 1.83 pJ/m) 25 , Ir/Co/Pt (𝐷 6 = 0.96 pJ/m) 24 , and sputtered Pt/Co/Re (𝐷 6 = 2.1 pJ/m) 22 . So, here, it should be noted that the higher iDMI is due to the additive nature of both interface contributions, namely from the Re/Co and the Co/Pt interfaces 22 .…”

Section: Resultsmentioning

confidence: 84%

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Magnetic Properties of epitaxial Re/Co1-xAux/Pt heterostructures

Jena,

Dhiman,

Lynnyk

et al. 2024

Preprint

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We investigate epitaxial Co(20 Å) and Co1-xAux(20 Å) alloy thin-films surrounded by asymmetric heavy metals layers of Re(10 Å) as a buffer and Pt(30 Å) as a cap to study the magnetic anisotropy, interfacial Dzyaloshinskii-Moriya interaction (iDMI) and damping. The increase of Au from 0% to 25% in the Co1-xAux alloy generates the spin-reorientation transition of around 13% of Au. The increase in Au concentration provides a significant decrease in saturation magnetization from 1690 kA/m to 982 kA/m measured for Co and Co75Au25, respectively. The effective anisotropy constant Keff is elevated up to 0.33 MJ/m3 by changing the Au content. Further, our investigations of the magnetization dynamics have confirmed that the overall effective damping constant rises with the Au concentration which can be attributed to the spin pumping effect. The spin pumping leads to the highest value of effective spin mixing conductance g(↑↓)≈2.91×1018/m2 in the Co90Au10(20 Å) system, while the lowest value of g(↑↓)≈2.25×1018/m2 is found for the Co(20 Å) system. Additionally, we have investigated the iDMI strength, and the amplitude of iDMI decreases with increasing Au concentration. The highest surface iDMI constant value equal to 2.62 pJ/m is observed for Co.

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Section: Resultscontrasting

confidence: 45%

Section: Resultsmentioning

confidence: 84%

Magnetic Properties of epitaxial Re/Co1-xAux/Pt heterostructures

Jena,

Dhiman,

Lynnyk

et al. 2024

Preprint

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“…Here, for the disordered system we restricted our consideration to the effect within the layer with Co-W intermixing, because the major impact on the DMI value in heterostructures comes from the interfacial layers. 4,45…”

Section: Resultsmentioning

confidence: 99%

XMCD and ab initio study of interface-engineered ultrathin Ru/Co/W/Ru films with perpendicular magnetic anisotropy and strong Dzyaloshinskii–Moriya interaction

Samardak

Ognev

Kolesnikov

et al. 2022

Phys. Chem. Chem. Phys.

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“…In addition to breaking the inversion symmetry, improving DMI also requires introducing asymmetry of the interfaces with respect to the magnetic layer. An asymmetry of interfaces can be achieved in different ways, in particular by adding different heavy metals, for example, Ir, , W, Re, and Ta, − at the bottom and top of the ferromagnetic layer. For example, multilayer structures with a Pt/Co/Ta structure exhibit large spin–orbit torque effects, as well as the ability to be a medium for high-density skyrmion lattices .…”

Section: Introductionmentioning

confidence: 99%

Effects of Interfacial Nanoengineering through an Artificial Oxidation of Epitaxial Pd/Co Ultrathin Films on Perpendicular Magnetic Anisotropy and the Dzyaloshinskii–Moriya Interaction

Kozlov,

Davydenko,

Afremov

et al. 2024

ACS Appl. Electron. Mater.

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Transition metal oxides are promising for future electronics because of their unique magnetoionic properties and spin−charge interconversion. Here, epitaxial Pd/Co films with an artificially oxidized magnetic layer are studied. The effect of the oxidation dose of the Co layer on the structural and magnetic properties is investigated. The opportunity of epitaxial growth of Pd layers on top of the partially disordered oxide layer with preservation of the epitaxial ratio is shown. The calculations show that the process of oxide formation occurs according to the layer-by-island growth mechanism. An increase in the anisotropy field from the residual thickness of cobalt with an increase in the oxidation dose is observed. The enhancement of the Dzyaloshinskii−Moriya interaction at the interface between the ferromagnet and the oxide layer is experimentally confirmed by analyzing the velocity curves of the asymmetric displacement of domain walls in crossed magnetic fields in the creep mode and is supported by Brillouin light scattering spectroscopy. We demonstrate that the most significant contribution to the interfacial Dzyaloshinskii−Moriya interaction in Pd/Co/ CoO films is made by the Co oxide layer. Our findings can be used to develop memory and logic devices of oxide spintronics having advantages of effective control of magnetization state, nonvolatility, low power consumption, and fast data processing.

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Interfacial Dzyaloshinskii–Moriya interaction in the epitaxial W/Co/Pt multilayers

Abstract: Dzyaloshinskii-Moriya interaction (DMI) manifesting in asymmetric layered ferromagnetic films gives rise to non-colinear spin structures stabilizing magnetization configurations with nontrivial topology. In this work magnetization reversal, magnetic domain alignment, and...

Cited by 17 publications

References 42 publications

Magnetic Properties of epitaxial Re/Co1-xAux/Pt heterostructures

Magnetic Properties of epitaxial Re/Co1-xAux/Pt heterostructures

XMCD and ab initio study of interface-engineered ultrathin Ru/Co/W/Ru films with perpendicular magnetic anisotropy and strong Dzyaloshinskii–Moriya interaction

Effects of Interfacial Nanoengineering through an Artificial Oxidation of Epitaxial Pd/Co Ultrathin Films on Perpendicular Magnetic Anisotropy and the Dzyaloshinskii–Moriya Interaction

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