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Condensed Matter > Strongly Correlated Electrons

arXiv:1511.05315 (cond-mat)
[Submitted on 17 Nov 2015]

Title:Itinerant and localized magnetization dynamics in antiferromagnetic Ho

Authors:L. Rettig, C. Dornes, N. Thielemann-Kuehn, N. Pontius, H. Zabel, D. L. Schlagel, T. A. Lograsso, M. Chollet, A. Robert, M. Sikorski, S. Song, J. M. Glownia, C. Schuessler-Langeheine, S. L. Johnson, U. Staub
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Abstract:Using femtosecond time-resolved resonant magnetic x-ray diffraction at the Ho L3 absorption edge, we investigate the demagnetization dynamics in antiferromagnetically ordered metallic Ho after femtosecond optical excitation. Tuning the x-ray energy to the electric dipole (E1, 2p -> 5d) or quadrupole (E2, 2p -> 4f) transition allows us to selectively and independently study the spin dynamics of the itinerant 5d and localized 4f electronic subsystems via the suppression of the magnetic (2 1 3-tau ) satellite peak. We find demagnetization timescales very similar to ferromagnetic 4f systems, suggesting that the loss of magnetic order occurs via a similar spin-flip process in both cases. The simultaneous demagnetization of both subsystems demonstrates strong intra-atomic 4f-5d exchange coupling. In addition, an ultrafast lattice contraction due to the release of magnetostriction leads to a transient shift of the magnetic satellite peak.
Subjects: Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1511.05315 [cond-mat.str-el]
  (or arXiv:1511.05315v1 [cond-mat.str-el] for this version)
  https://doi.org/10.48550/arXiv.1511.05315
Journal reference: Phys. Rev. Lett. 116, 257202 (2016)
Related DOI: https://doi.org/10.1103/PhysRevLett.116.257202

Submission history

From: Laurenz Rettig [view email]
[v1] Tue, 17 Nov 2015 09:11:10 UTC (850 KB)
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