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Keywords = SPLEEM

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13 pages, 3517 KB  
Article
Tailoring the Spin Reorientation Transition of Co Films by Pd Monolayer Capping
by Benito Santos Burgos, Raúl López-Martín, José A. De Toro, Chris Binns, Andreas K. Schmid and Juan de la Figuera
Nanomaterials 2024, 14(20), 1662; https://doi.org/10.3390/nano14201662 - 16 Oct 2024
Viewed by 1813
Abstract
We have characterized the magnetization easy-axis of ultra-thin Co films (2–5 atomic layers, AL) grown on Ru(0001) when they are capped with a monolayer of Pd. The addition of a Pd monolayer turns the magnetization of 3 and 4 AL-thick Co films from [...] Read more.
We have characterized the magnetization easy-axis of ultra-thin Co films (2–5 atomic layers, AL) grown on Ru(0001) when they are capped with a monolayer of Pd. The addition of a Pd monolayer turns the magnetization of 3 and 4 AL-thick Co films from an in-plane to an out-of-plane alignment, but not that of a 5 AL-thick film. These observations are explained in terms of an enhancement of the surface anisotropy. The exposure of the sample to hydrogen, CO or a combination of both gases does not overcome this effect. Full article
(This article belongs to the Section Synthesis, Interfaces and Nanostructures)
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14 pages, 3338 KB  
Article
Tuning Ferromagnetism in a Single Layer of Fe above Room Temperature
by Ryszard Zdyb, Krisztián Palotás, Eszter Simon, Tomasz Jaroch and Zbigniew Korczak
Materials 2022, 15(3), 1019; https://doi.org/10.3390/ma15031019 - 28 Jan 2022
Cited by 1 | Viewed by 2985
Abstract
The crystallographic and magnetic properties of an Fe monolayer (ML) grown on 2 ML Au/W(110) substrate are studied with spin-polarized low-energy electron microscopy, density functional theory, and relativistic screened Korringa–Kohn–Rostoker calculations. The single layer of iron atoms possesses hexagonal symmetry and reveals a [...] Read more.
The crystallographic and magnetic properties of an Fe monolayer (ML) grown on 2 ML Au/W(110) substrate are studied with spin-polarized low-energy electron microscopy, density functional theory, and relativistic screened Korringa–Kohn–Rostoker calculations. The single layer of iron atoms possesses hexagonal symmetry and reveals a ferromagnetic order at room temperature. We experimentally demonstrate the possibility of tuning the Curie temperature and the magnitude of magnetization of the Fe monolayer by capping with Au. Taking into account several structural models, the calculation results mostly show ferromagnetic states with enhanced magnetic moments of Fe atoms compared to their bulk value and a further increase in their value after covering with Au. The theoretically calculated Curie temperatures are in fair agreement with those obtained in the experiments. The calculations, furthermore, found evidence for the presence of frustrated isotropic Fe–Fe exchange interactions, and a discussion of the structural effects on the magnetic properties is provided herein. Full article
(This article belongs to the Special Issue Multilayer and Hybrid Two-Dimensional Materials)
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