Interfacial Dzyaloshinskii-Moriya interaction in epitaxial W/Co/Pt multilayers
| Autor: | Roman Minikayev, M. Jakubowski, Paweł Aleszkiewicz, A. Pietruczik, Ewelina Milińska, Artem Lynnyk, Rajibul Islam, Sukanta Kumar Jena, Andrzej Wawro, Carmine Autieri, Sabina Lewińska |
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| Rok vydání: | 2023 |
| Předmět: |
Condensed Matter - Materials Science
Materials science Magnetic domain Condensed matter physics Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology Epitaxy 01 natural sciences Condensed Matter::Materials Science Magnetization Ferromagnetism Sputtering 0103 physical sciences General Materials Science Density functional theory 010306 general physics 0210 nano-technology Molecular beam epitaxy Spin-½ |
| DOI: | 10.48550/arxiv.2302.06721 |
| Popis: | The 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 strength of DMI are related to the crystalline structure of W/Co/Pt multilayers grown by molecular beam epitaxy. The applied growth method enables the fabrication of layered systems with higher crystalline quality than commonly applied sputtering techniques. A relatively high value of the D coefficient was determined from the aligned magnetic domain stripe structure, substantially exceeding 2 mJ m-2. The highest value of DMI strength Deff = 2.64 mJ m-2 and surface DMI parameter DS = 1.83 pJ m-1 have been observed for a repetition number equal to 10. The experimental results correlate exactly with those obtained from the micromagnetic modelling and density functional theory calculations performed for the well-defined layered stacks. This high value of DMI strength originates from the additive contributions of the interfacial atomic Co layers at the two types of interfaces. |
| Databáze: | OpenAIRE |
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