ferromagnetic metals induced by femtosecond optical pulses. Our approach allows the
observation of the initial change of the modulus and orientation of the magnetization,
occurring within a few hundreds of femtoseconds, as well as its subsequent precession and
damping around the effective field. The role of the magnetocrystalline anisotropy shows up
in the magnetization reorientation occurring during the electron-lattice relaxation. In addition …