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Probing surface and...
Probing surface and bulk ground states of lanthanides: 4f moment orientation through 4d x-ray absorption spectroscopy
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- Usachov, Dmitry Yu (author)
- Saint Petersburg State University - Spsu,Moscow Institute of Physics and Technology
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- Bokai, K. A. (author)
- Saint Petersburg State University - Spsu,Moscow Institute of Physics and Technology
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- Klimovskikh, I. I. (author)
- Donostia International Physics Center
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- Ali, Khadiza, 1989 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Schiller, F. (author)
- Centro de Física de Materiales (CSIC-UPV/EHU)
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- Poelchen, Georg (author)
- Technische Universität Dresden
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- Stolyarov, V. S. (author)
- Moscow Institute of Physics and Technology
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- Kliemt, Kristin (author)
- Johann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt
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- Krellner, Cornelius (author)
- Johann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt
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- Vyalikh, Denis V. (author)
- Donostia International Physics Center,Basque Foundation for Science (Ikerbasque)
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Physical Review B. - 2469-9969 .- 2469-9950. ; 110:7
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Abstract
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- Knowledge of the ground state of lanthanides (Ln) in Ln-based materials is fundamental for understanding their properties, particularly those related to magnetism. In crystalline materials, the magnitude and orientation of 4f magnetic moments are often strongly influenced by the crystal electric field (CEF), making them challenging to predict ab initio. This complexity is intensified in low-dimensional systems and nanostructures, where the CEF may vary significantly near surfaces and at interfaces. The related variations of the 4f ground state should be probed by methods with adjustable surface sensitivity. Here, we apply x-ray absorption spectroscopy (XAS) at the Ln 4d edge, along with modeling of XAS spectra, to probe the 4f ground state of Ln atoms both at the surface and in the bulk of LnRh2Si2 layered crystals. Our results explicitly reveal significant changes of the 4f ground state, which may lead to the reorientation of 4f moments at the surface compared to the bulk, driven by alterations of the CEF. We also provide a comprehensive database of calculated Ln 4d XAS spectra in numeric format for all lanthanides. Our findings will facilitate studies of Ln-based materials and molecular complexes by enabling comprehensive analysis of XAS data, including those obtained through magnetic linear and circular dichroism techniques, as well as related spectromicroscopy studies.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Usachov, Dmitry ...
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Bokai, K. A.
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Klimovskikh, I. ...
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Ali, Khadiza, 19 ...
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Schiller, F.
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Poelchen, Georg
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show more...
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Stolyarov, V. S.
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Kliemt, Kristin
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Krellner, Cornel ...
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Vyalikh, Denis V ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Physical Review ...
- By the university
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Chalmers University of Technology