Controlling 4 f antiferromagnetic dynamics via itinerant electronic susceptibility

Lee, Sang-Eun; Windsor, Yoav William; Zahn, Daniela; Kraiker, Alexej; Kummer, Kurt; Kliemt, Kristin; Krellner, Cornelius; Schüßler-Langeheine, Christian; Pontius, Niko; Staub, Urs; Vyalikh, Denis V.; Ernst, Arthur; Rettig, Laurenz

doi:10.1103/PhysRevResearch.6.043019

Title: Controlling $4 f$ antiferromagnetic dynamics via itinerant electronic susceptibility

Journal Article · 04 October 2024 · Physical Review Research

DOI: https://doi.org/10.1103/PhysRevResearch.6.043019 · OSTI ID:2474033

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Optical manipulation of magnetism holds promise for future ultrafast spintronics, especially with lanthanides and their huge, localized $4 f$ magnetic moments. These moments interact indirectly by spin polarizing the conduction electrons (the Ruderman-Kittel-Kasuya-Yosida exchange interaction), influenced by interatomic orbital overlap, and the conduction electron's susceptibility around the Fermi level. Here, we study this influence in a series of $4 f$ antiferromagnets, $Gd T_{2} {Si}_{2}$ ( $T$ = Co, Rh, Ir), using ultrafast resonant x-ray diffraction. We observe a twofold increase in the ultrafast intersublattice angular momentum transfer rate between the materials, originating from modifications in the conduction electron susceptibility, as confirmed by first-principles calculations. Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NONE; 89233218CNA000001

OSTI ID:: 2474033

Journal Information:: Physical Review Research, Journal Name: Physical Review Research Journal Issue: 4 Vol. 6; ISSN PPRHAI; ISSN 2643-1564

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Dataset to: Controlling 4f antiferromagnetic dynamics via itinerant electronic susceptibility Rettig, Laurenz; Kummer, Kurt; Windsor, Yoav William Zenodo https://doi.org/10.5281/zenodo.13819444	dataset	January 2024