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Controlling 4f antiferromagnetic dynamics via itinerant electronic susceptibility

S.-E. Lee, Y. W. Windsor, D. Zahn, A. Kraiker, K. Kummer, K. Kliemt, C. Krellner, C. Schüßler-Lange-heine, N. Pontius, U. Staub, D. V. Vyalikh, A. Ernst, and L. Rettig – 2024

Optical manipulation of magnetism holds promise for future ultrafast spintronics, especially with lanthanides and their huge, localized 4⁢𝑓 magnetic moments. These 4f 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⁢𝑇2⁢Si2 (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.

Title
Controlling 4f antiferromagnetic dynamics via itinerant electronic susceptibility
Author
S.-E. Lee, Y. W. Windsor, D. Zahn, A. Kraiker, K. Kummer, K. Kliemt, C. Krellner, C. Schüßler-Lange-heine, N. Pontius, U. Staub, D. V. Vyalikh, A. Ernst, and L. Rettig
Date
2024
Identifier
DOI: 10.1103/PhysRevResearch.6.043019
Appeared in
Phys. Rev. Research 6, 043019 (2024)
Type
Text