1. E. Beaurepaire, J.-C. Merle, A. Daunois, and J.-Y. Bigot, “Ultrafast spin dynamics in ferromagnetic nickel” Phys. Rev. Lett. 76, 4250 (1996).
2. G. P. Zhang and W. Hübner, “Laser-induced ultrafast demagnetization in ferromagnetic metals” Phys. Rev. Lett. 85, 3025 (2000).
3. M. S. Si and G. P. Zhang, “Resolving photon-shortage mystery in femtosecond magnetism” J. Phys.: Condens. Matter 22, 076005 (2010).
4. A. Kirilyuk, A. V. Kimel, and T. Rasing, “Ultrafast optical manipulation of magnetic order” Rev. Mol. Phys. 82, 2731 (2010).
5. M. Pickel, A. B. Schmidt, F. Giesen, J. Braun, J. Minár, H. Ebert, M. Donath, and M. Weinelt, “Spin-orbit hybridization points in the faced-centered cubic cobalt band structure” Phys. Rev. Lett. 101, 066402 (2008).