Modeling of ultrafast X-ray induced magnetization dynamics in magnetic multilayer systems
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Abstract
Abstract In this work, we report on modeling results obtained with our recently developed simulation tool enabling nanoscopic description of electronic processes in X-ray irradiated ferromagnetic materials. With this tool, we have studied the response of Co/Pt multilayer system irradiated by an ultrafast extreme ultraviolet pulse at the M-edge of Co (photon energy ~60 eV). It was previously investigated experimentally at the FERMI free-electron-laser facility, using the magnetic small-angle X-ray scattering technique. Our simulations show that the magnetic scattering signal from cobalt decreases on femtosecond timescales due to electronic excitation, relaxation, and transport processes both in the cobalt and in the platinum layers, following the trend observed in the experimental data. The confirmation of the predominant role of electronic processes for X-ray induced demagnetization in the regime below the structural damage threshold is a step toward quantitative control and manipulation of X-ray induced magnetic processes on femtosecond timescales.
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Research context
OpenAlex topics: Advanced X-ray Imaging Techniques · X-ray Spectroscopy and Fluorescence Analysis · Laser-Plasma Interactions and Diagnostics
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References (57)
Show source-provided references
1. Ackermann, W. et al. Operation of a free-electron laser from the extreme ultraviolet to the water window. Nat. Photonics 1, 336–342 (2007).10.1038/nphoton.2007.76 ↗
2. Emma, P. et al. First lasing and operation of an ångstrom-wavelength free-electron laser. Nat. Photonics 4, 641–647 (2010).10.1038/nphoton.2010.176 ↗
3. Pile, D. First light from SACLA. Nat. Photonics 5, 456–457 (2011).10.1038/nphoton.2011.178 ↗
4. Allaria, E. et al. Highly coherent and stable pulses from the FERMI seeded free-electron laser in the extreme ultraviolet. Nat. Photonics 6, 699–704 (2012).10.1038/nphoton.2012.233 ↗
5. Capotondi, F. et al. Invited article: coherent imaging using seeded free-electron laser pulses with variable polarization: First results and research opportunities. Rev. Sci. Instrum. 84, 051301 (2013).10.1063/1.4807157 ↗
6. Beaurepaire, E., Merle, J.-C., Daunois, A. & Bigot, J.-Y. Ultrafast spin dynamics in ferromagnetic nickel. Phys. Rev. Lett. 76, 4250–4253 (1996).10.1103/PhysRevLett.76.4250 ↗
7. Kirilyuk, A., Kimel, A. V. & Rasing, T. Ultrafast optical manipulation of magnetic order. Rev. Mod. Phys. 82, 2731–2784 (2010).10.1103/RevModPhys.82.2731 ↗
8. Koopmans, B. et al. Explaining the paradoxical diversity of ultrafast laser-induced demagnetization. Nat. Mater. 9, 259–265 (2010).10.1038/nmat2593 ↗
9. Pfau, B. et al. Ultrafast optical demagnetization manipulates nanoscale spin structure in domain walls. Nat. Commun. 3, 1100 (2012).10.1038/ncomms2108 ↗
10. Sander, D. et al. The 2017 magnetism roadmap. J. Phys. D: Appl. Phys. 50, 363001 (2017).10.1088/1361-6463/aa81a1 ↗
11. Philippi-Kobs, A. et al. Ultrafast demagnetization excited by extreme ultraviolet light from a free-electron laser (2021). Preprint at https://www.researchsquare.com/article/rs-955056/v1.
12. Schneider, M. et al. Ultrafast demagnetization dominates fluence dependence of magnetic scattering at Co M edges. Phys. Rev. Lett. 125, 127201 (2020).10.1103/PhysRevLett.125.127201 ↗
13. Mueller, L. et al. Breakdown of the x-ray resonant magnetic scattering signal during intense pulses of extreme ultraviolet free-electron-laser radiation. Phys. Rev. Lett. 110, 234801 (2013).10.1103/PhysRevLett.110.234801 ↗
14. Stöhr, J. & Scherz, A. Creation of x-ray transparency of matter by stimulated elastic forward scattering. Phys. Rev. Lett. 115, 107402 (2015).10.1103/PhysRevLett.115.107402 ↗
15. Wu, B. et al. Elimination of x-ray diffraction through stimulated x-ray transmission. Phys. Rev. Lett. 117, 027401 (2016).10.1103/PhysRevLett.117.027401 ↗
16. Wang, T. et al. Femtosecond single-shot imaging of nanoscale ferromagnetic order in Co/Pd multilayers using resonant x-ray holography. Phys. Rev. Lett. 108, 267403 (2012).10.1103/PhysRevLett.108.267403 ↗
17. Hannon, J. P., Trammell, G. T., Blume, M. & Gibbs, D. X-ray resonance exchange scattering. Phys. Rev. Lett. 61, 1245–1248 (1988).10.1103/PhysRevLett.61.1245 ↗
18. Hill, J. P. & McMorrow, D. F. X-ray resonant exchange scattering: polarization dependence and correlation functions. Acta Cryst. A52, 236–244 (1996).10.1107/S0108767395012670 ↗
19. Brueckel, T. Atomic and magnetic structures in crystalline materials: neutron and x-ray scattering. Schr. Forschungszent. Juelich, Mater. Mater. 34, D1/1–D1/47 (2007).
20. Gutt, C. et al. Single-pulse resonant magnetic scattering using a soft x-ray free-electron laser. Phys. Rev. B 81, 100401 (2010).10.1103/PhysRevB.81.100401 ↗
21. Willems, F. et al. Multi-color imaging of magnetic Co/Pt heterostructures. Str. Dyn. 4, 014301 (2017).10.1063/1.4976004 ↗
22. Riepp, M. et al. Ultrafast magnetisation dynamics at the low-fluence limit supported by external magnetic fields. In 39th Free Electron Laser Conference (FEL’19), Hamburg, Germany, 26-30 August 2019, 574-577 (JACOW Publishing, Geneva, Switzerland, 2019).
23. Bran, C. Domain structure and magnetization processes of complex magnetic multilayers. PhD Thesis, Technical Univ. Dresden. https://d-nb.info/1009523279/34 (2010).
24. Hellwig, O., Berger, A., Kortright, J. & Fullerton, E. Domain structure and magnetization reversal of antiferromagnetically coupled perpendicular anisotropy films. J. Magn. Magn. Mater. 319, 13–55 (2007).10.1016/j.jmmm.2007.04.035 ↗
25. Medvedev, N., Jeschke, H. O. & Ziaja, B. Nonthermal phase transitions in semiconductors induced by a femtosecond extreme ultraviolet laser pulse. N. J. Phys. 15, 015016 (2013).10.1088/1367-2630/15/1/015016 ↗
26. Medvedev, N., Tkachenko, V., Lipp, V., Li, Z. & Ziaja, B. Various damage mechanisms in carbon and silicon materials under femtosecond x-ray irradiation. 4open 1, 3 (2018).10.1051/fopen/2018003 ↗
27. Werner, P., Eckstein, M., Mueller, M. & Refael, G. Light-induced symmetry breaking in the Hubbard model. Nat. Commun. 10, 5556 (2019).10.1038/s41467-019-13557-9 ↗
28. Sandholzer, K. et al. Quantum simulation meets nonequilibrium dynamical mean-field theory: exploring the periodically driven, strongly correlated Fermi-Hubbard model. Phys. Rev. Lett. 123, 193602 (2019).10.1103/PhysRevLett.123.193602 ↗
29. VASP. The Vienna ab initio simulation package: Atomic scale materials modelling from first principles (2022). https://www.vasp.at.
30. Kresse, G. & Hafner, J. Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium. Phys. Rev. B 49, 14251–14269 (1994).10.1103/PhysRevB.49.14251 ↗
31. Kresse, G. & Furthmüller, J. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set. Phys. Rev. B 54, 11169–11186 (1996).10.1103/PhysRevB.54.11169 ↗
32. Kresse, G. & Joubert, D. From ultrasoft pseudopotentials to the projector augmented-wave method. Phys. Rev. B 59, 1758–1775 (1999).10.1103/PhysRevB.59.1758 ↗
33. Stoner, E. C. & Wohlfarth, E. P. A mechanism of magnetic hysteresis in hereogeneous alloys. Philos. Trans. R. Soc. Lond. A 240, 599–642 (1948).10.1098/rsta.1948.0007 ↗
34. Tannous, C. & Gieraltowski, J. The Stoner-Wohlfarth model of ferromagnetism. Eur. J. Phys. 29, 475–487 (2008).10.1088/0143-0807/29/3/008 ↗
35. Medvedev, N. & Ziaja, B. Multistep transition of diamond to warm dense matter state revealed by femtosecond x-ray diffraction. Sci. Rep. 8, 5284 (2018).10.1038/s41598-018-23632-8 ↗
36. Cullen, D. E., Hubbell, J. H. & Kissel, L.EPDL97: the evaluated photo data library ’97 version (UCRL-LR-50400 Vol. 6 Rev. 5; Lawrence Livermore National Lab., 1997). https://doi.org/10.2172/295438.10.2172/295438 ↗
37. Perkins, S. T. et al. Tables and graphs of atomic subshell and relaxation data derived from the LLNL Evaluated Atomic Data Library (EADL), Z = 1 − 100 (UCRL-50400-Vol.30; Lawrence Livermore National Lab., 1991). https://doi.org/10.2172/10121422.10.2172/10121422 ↗
38. Thompson, A. et al. X-ray Data Booklet 3rd edn (Lawrence Berkeley National Laboratory, University of California, 2009).
39. Son, S.-K., Young, L. & Santra, R. Impact of hollow-atom formation on coherent x-ray scattering at high intensity. Phys. Rev. A 83, 033402 (2011).10.1103/PhysRevA.83.033402 ↗
40. Tavella, F. et al. Soft x-ray induced femtosecond solid-to-solid phase transition. High. Energy Density Phys. 24, 22–27 (2017).10.1016/j.hedp.2017.06.001 ↗
41. Inoue, I. et al. Atomic-scale visualization of ultrafast bond breaking in X-ray-excited diamond. Phys. Rev. Lett. 126, 117403 (2021).10.1103/PhysRevLett.126.117403 ↗
42. Tkachenko, V. et al. Limitations of structural insight into ultrafast melting of solid materials with x-ray diffraction imaging. Appl. Sci. 11, 5157 (2021).10.3390/app11115157 ↗
43. Carva, K., Battiato, M. & Oppeneer, P. M. Ab initio investigation of the Elliott-Yafet electron-phonon mechanism in laser-induced ultrafast demagnetization. Phys. Rev. Lett. 107, 207201 (2011).10.1103/PhysRevLett.107.207201 ↗
44. Lipp, V., Medvedev, N. & Ziaja, B. Classical Monte-Carlo simulations of x-ray induced electron cascades in various materials. Proc. SPIE 10239, 102360H (2017).
45. Battiato, M., Carva, K. & Oppeneer, P. M. Superdiffusive spin transport as a mechanism of ultrafast demagnetization. Phys. Rev. Lett. 105, 027203 (2010).10.1103/PhysRevLett.105.027203 ↗
46. Battiato, M., Carva, K. & Oppeneer, P. M. Theory of laser-induced ultrafast superdiffusive spin transport in layered heterostructures. Phys. Rev. B 86, 024404 (2012).10.1103/PhysRevB.86.024404 ↗
47. Follath, R. et al. X-ray induced damage of B4C-coated multilayer materials under various irradiation geometries. Sci. Rep. 9, 2029 (2019).10.1038/s41598-019-38556-0 ↗
48. Stöhr, J. & Siegmann, H. C. Magnetism: From Fundamentals to Nanoscale Dynamics (Springer Series in Solid-State Sciences vol. 152, Springer, 2006).
49. Hennes, M. et al. Time-resolved XUV absorption spectroscopy and magnetic circular dichroism at the Ni M2,3-edges. Appl. Sci. 11, 325 (2021).10.3390/app11010325 ↗
50. Carva, K., Legut, D. & Oppeneer, P. M. Influence of laser-excited electron distributions on the x-ray magnetic circular dichroism spectra: Implications for femtosecond demagnetization in Ni. EPL 86, 57002 (2009).10.1209/0295-5075/86/57002 ↗
51. Murphy, B. et al. Femtosecond x-ray-induced explosion of C60 at extreme intensity. Nat. Commun. 5, 4281 (2014).10.1038/ncomms5281 ↗
52. Ho, P. J. et al. The role of transient resonances for ultra-fast imaging of single sucrose nanoclusters. Nat. Commun. 11, 167 (2020).10.1038/s41467-019-13905-9 ↗
53. Beyerlein, K. R. et al. Ultrafast nonthermal heating of water initiated by an x-ray free-electron laser. Proc. Natl Acad. Sci. USA 115, 5652–5657 (2018).10.1073/pnas.1711220115 ↗
54. Medvedev, N., Li, Z., Tkachenko, V. & Ziaja, B. Electron-ion coupling in semiconductors beyond Fermi’s golden rule. Phys. Rev. B 95, 014309 (2017).10.1103/PhysRevB.95.014309 ↗
55. Lipp, V. et al. Density functional tight binding approach utilized to study x-ray-induced transitions in solid materials. Sci. Rep. 12, 1551 (2022).10.1038/s41598-022-04775-1 ↗
56. Hourahine, B. et al. DFTB+, a software package for efficient approximate density functional theory based atomistic simulations. J. Chem. Phys. 152, 124101 (2020).10.1063/1.5143190 ↗
57. Medvedev, N., Jeschke, H. & Ziaja, B. Nonthermal graphitization of diamond induced by a femtosecond x-ray laser pulse. Phys. Rev. B 88, 224304 (2013).10.1103/PhysRevB.88.224304 ↗