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  • Letter
  • Open Access

Applicability and breakdown of transient magnetic linear dichroism

E. I. Harris-Lee and J. K. Dewhurst

P. Elliott and S. Shallcross

S. Sharma*

  • Max-Planck-Institut fur Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany

  • Max-Born-Institute for Non-linear Optics and Short Pulse Spectroscopy, Max-Born Strasse 2A, 12489 Berlin, Germany

  • Max-Born-Institute for Non-linear Optics and Short Pulse Spectroscopy, Max-Born Strasse 2A, 12489 Berlin, Germany and Institute for Theoretical Solid-State Physics, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

  • *sharma@mbi-berlin.de
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Phys. Rev. B 108, L100303 – Published 14 September, 2023

DOI: https://doi.org/10.1103/PhysRevB.108.L100303

Abstract

In highly out-of-equilibrium states of matter, such as those induced by a pump laser, the applicability of well-established spectroscopic probes of magnetic order are called into question. Here we address the validity of x-ray absorption techniques in pump laser conditions, focusing on magnetic linear dichroism (MLD), a crucial probe of antiferromagnetic (AFM) order. We directly compute the dynamics of the square of the spin moment and compare the results to those obtained via the MLD response. For AFM FePd the agreement between these distinct routes to the magnetic moment severely degrades at pulse fluences greater than ∼1mJ/cm2, indicating a breakdown of the MLD response as an accurate probe of the transient moment. This contrasts with the MLD for ferromagnetic FePt, which reliably tracks the moment for fluences (and absorbed energies) up to an order of magnitude greater than the breakdown threshold for AFM FePd. We find the underlying microscopic reason for this to be increased laser induced excitations out of the d band in AFM FePd, where this increase is made possible by the AFM pseudogap.

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References (34)

  1. T. Jungwirth, J. Sinova, A. Manchon, X. Marti, J. Wunderlich, and C. Felser, The multiple directions of antiferromagnetic spintronics, Nat. Phys. 14, 200 (2018).
  2. K. Olejník, T. Seifert, Z. Kašpar, V. Novák, P. Wadley, R. P. Campion, M. Baumgartner, P. Gambardella, P. Němec, J. Wunderlich, J. Sinova, P. Kužel, M. Müller, T. Kampfrath, and T. Jungwirth, Terahertz electrical writing speed in an antiferromagnetic memory, Sci. Adv. 4, eaar3566 (2018).
  3. B. Pal, B. K. Hazra, B. Göbel, J. C. Jeon, A. K. Pandeya, A. Chakraborty, O. Busch, A. K. Srivastava, H. Deniz, J. M. Taylor, H. Meyerheim, I. Mertig, S. H. Yang, and S. S. P. Parkin, Setting of the magnetic structure of chiral kagome antiferromagnets by a seeded spin-orbit torque, Sci. Adv. 8, eabo5930 (2022).
  4. T. Jungwirth, X. Marti, P. Wadley, and J. Wunderlich, Antiferromagnetic spintronics, Nat. Nanotechnol. 11, 231 (2016).
  5. M. Vergès, V. Kumar, P.-H. Lin, S. Mangin, and C.-H. Lai, Role of induced exchange bias in zero field spin-orbit torque magnetization switching in Pt/[Ni/Co]/PtMn, AIP Adv. 10, 085320 (2020).
  6. G. Fabiani, M. D. Bouman, and J. H. Mentink, Supermagnonic Propagation in Two-Dimensional Antiferromagnets, Phys. Rev. Lett. 127, 097202 (2021).
  7. T. Dannegger, M. Berritta, K. Carva, S. Selzer, U. Ritzmann, P. M. Oppeneer, and U. Nowak, Ultrafast coherent all-optical switching of an antiferromagnet with the inverse Faraday effect, Phys. Rev. B 104, L060413 (2021).
  8. D. Bossini, S. Dal Conte, G. Cerullo, O. Gomonay, R. V. Pisarev, M. Borovsak, D. Mihailovic, J. Sinova, J. H. Mentink, Th. Rasing, and A. V. Kimel, Laser-driven quantum magnonics and terahertz dynamics of the order parameter in antiferromagnets, Phys. Rev. B 100, 024428 (2019).
  9. P. Němec, M. Fiebig, T. Kampfrath, and A. V. Kimel, Antiferromagnetic opto-spintronics, Nat. Phys. 14, 229 (2018).
  10. P. Wadley et al., Electrical switching of an antiferromagnet, Science 351, 587 (2016).
  11. V. Baltz, A. Manchon, M. Tsoi, T. Moriyama, T. Ono, and Y. Tserkovnyak, Antiferromagnetic spintronics, Rev. Mod. Phys. 90, 015005 (2018).
  12. J. K. Dewhurst, P. Elliott, S. Shallcross, E. K. U. Gross, and S. Sharma, Laser-induced intersite spin transfer, Nano Lett. 18, 1842 (2018).
  13. G. van der Laan, B. T. Thole, G. A. Sawatzky, J. B. Goedkoop, J. C. Fuggle, J.-M. Esteva, R. Karnatak, J. P. Remeika, and H. A. Dabkowska, Experimental proof of magnetic x-ray dichroism, Phys. Rev. B 34, 6529 (1986).
  14. B. T. Thole, G. van der Laan, and G. A. Sawatzky, Strong Magnetic Dichroism Predicted in the M4,5 X-Ray Absorption Spectra of Magnetic Rare-Earth Materials, Phys. Rev. Lett. 55, 2086 (1985).
  15. J. Stöhr and H. C. Siegmann, Magnetism, Springer Series in Solid-State Sciences (SSSOL), Vol. 152 (Springer, Berlin, Heidelberg, 2006).
  16. N. Thielemann-Kühn, D. Schick, N. Pontius, C. Trabant, R. Mitzner, K. Holldack, H. Zabel, A. Föhlisch, and C. Schüßler-Langeheine, Ultrafast and Energy-Efficient Quenching of Spin Order: Antiferromagnetism Beats Ferromagnetism, Phys. Rev. Lett. 119, 197202 (2017).
  17. H. C. Zhao, H. Xia, S. Hu, Y. Y. Lv, Z. R. Zhao, J. He, E. Liang, G. Ni, L. Y. Chen, X. P. Qiu, S. M. Zhou, and H. B. Zhao, Large ultrafast-modulated Voigt effect in noncollinear antiferromagnet Mn3Sn, Nat. Commun. 12, 5266 (2021).
  18. H. Ebert, J. Stöhr, S. S. P. Parkin, M. Samant, and A. Nilsson, L-edge x-ray absorption in fcc and bcc Cu metal: Comparison of experimental and first-principles theoretical results, Phys. Rev. B 53, 16067 (1996).
  19. S. Sharma, S. Shallcross, P. Elliott, S. Eisebitt, C. von Korff Schmising, and J. K. Dewhurst, Computational analysis of transient XMCD sum rules for laser pumped systems: When do they fail? Appl. Phys. Lett. 120, 062409 (2022).
  20. F. Willems, C. von Korff Schmising, C. Strüber, D. Schick, D. W. Engel, J. K. Dewhurst, P. Elliott, S. Sharma, and S. Eisebitt, Optical inter-site spin transfer probed by energy and spin-resolved transient absorption spectroscopy, Nat. Commun. 11, 871 (2020).
  21. J. K. Dewhurst, F. Willems, P. Elliott, Q. Z. Li, C. von Korff Schmising, C. Strüber, D. W. Engel, S. Eisebitt, and S. Sharma, Specificity of Transient Extreme Ultraviolet Magnetic Dichroism, Phys. Rev. Lett. 124, 077203 (2020).
  22. M. Hofherr, S. Häuser, J. K. Dewhurst, P. Tengdin, S. Sakshath, H. T. Nembach, S. T. Weber, J. M. Shaw, T. J. Silva, H. C. Kapteyn, M. Cinchetti, B. Rethfeld, M. M. Murnane, D. Steil, B. Stadtmüller, S. Sharma, M. Aeschlimann, and S. Mathias, Ultrafast optically induced spin transfer in ferromagnetic alloys, Sci. Adv. 6, eaay8717 (2020).
  23. E. Runge and E. K. U. Gross, Density-Functional Theory for Time-Dependent Systems, Phys. Rev. Lett. 52, 997 (1984).
  24. S. Sharma, J. K. Dewhurst, and E. K. U. Gross, Optical response of extended systems using time-dependent density functional theory, in First Principles Approaches to Spectroscopic Properties of Complex Materials, edited by C. Di Valentin, S. Botti, and M. Cococcioni (Springer, Berlin, 2014), pp. 235–257.
  25. S. Sharma, J. K. Dewhurst, A. Sanna, and E. K. U. Gross, Bootstrap Approximation for the Exchange-Correlation Kernel of Time-Dependent Density-Functional Theory, Phys. Rev. Lett. 107, 186401 (2011).
  26. J. Kuneš, P. M. Oppeneer, S. Valencia, D. Abramsohn, H. Ch. Mertins, W. Gudat, M. Hecker, and C. M. Schneider, Understanding the XMLD and its magnetocrystalline anisotropy at the L2,3-edges of 3d transition metals, J. Magn. Magn. Mater. 272–276, 2146 (2004).
  27. D. J. Singh, Planewaves Pseudopotentials and the LAPW Method (Kluwer, Boston, 1994).
  28. J. K. Dewhurst, S. Sharma, L. Nordström, F. Cricchio, O. Grånäs, and E. K. U Gross, The ELK code (2023), https://elk.sourceforge.io/.
  29. J. K. Dewhurst, K. Krieger, S. Sharma, and E. K. U. Gross, An efficient algorithm for time propagation as applied to linearized augmented plane wave method, Comput. Phys. Commun. 209, 92 (2016).
  30. K. Krieger, J. K. Dewhurst, P. Elliott, S. Sharma, and E. K. U. Gross, Laser-Induced Demagnetization at Ultrashort Time Scales: Predictions of TDDFT, J. Chem. Theory Comput. 11, 4870 (2015).
  31. L. Hedin, New method for calculating the one-particle Green's function with application to the electron-gas problem, Phys. Rev. 139, A796 (1965).
  32. H. J. Vidberg and J. W. Serene, Solving the Eliashberg equations by means of N-point Padé approximants, J. Low Temp. Phys. 29, 179 (1977).
  33. S. Shallcross, L. Nordström, and S. Sharma, Magnetic phase diagrams from non-collinear canonical band theory, Phys. Rev. B 76, 054444 (2007).
  34. J. Kübler, Theory of Itinerant Electron Magnetism (Oxford University Press, Oxford, 2000).

Outline

Information

Phys. Rev. B 108, L100303– Published 14 September, 2023
  • Received 3 March 2023
  • Revised 16 August 2023
  • Accepted 1 September 2023
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.

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