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Título: | Effect of the valence state on the band magnetocrystalline anisotropy in two-dimensional rare-earth/noble-metal compounds |
Autor: | Blanco-Rey, María CSIC ORCID; Castrillo-Bodero, Rodrigo CSIC ORCID; Ali, Khadiza CSIC ORCID; Gargiani, Pierluigi; Bertram, Florian; Sheverdyaeva, P. M.; Ortega, J. Enrique CSIC ORCID; Fernández, Laura CSIC ORCID; Schiller, Frederik CSIC ORCID | Fecha de publicación: | 2022 | Editor: | American Physical Society | Citación: | Physical Review Research 4(1): 013237 (2022) | Resumen: | In intermetallic compounds with zero orbital momentum (L=0) the magnetic anisotropy and the electronic band structure are interconnected. Here, we investigate this connection in divalent Eu and trivalent Gd intermetallic compounds. We find by x-ray magnetic circular dichroism an out-of-plane easy magnetization axis in two-dimensional atom-thick EuAu2. Angle-resolved photoemission spectroscopy and density-functional theory prove that this is due to strong f−d band hybridization and Eu2+ valence. In contrast, the easy in-plane magnetization of the structurally equivalent GdAu2 is ruled by spin-orbit-split d bands, notably Weyl nodal lines, occupied in the Gd3+ state. Regardless of the L value, we predict a similar itinerant electron contribution to the anisotropy of analogous compounds. | Versión del editor: | https://doi.org/10.1103/PhysRevResearch.4.013237 | URI: | http://hdl.handle.net/10261/284373 | DOI: | 10.1103/PhysRevResearch.4.013237 | E-ISSN: | 2643-1564 |
Aparece en las colecciones: | (CFM) Artículos |
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