Ultrafast optical modification of magnetic anisotropy and stimulated precession in an epitaxial Co2MnAl thin film

Y. Liu, L. R. Shelford, V. V. Kruglyak, R. J. Hicken, Y. Sakuraba, M. Oogane, Y. Ando, T. Miyazaki
2007 Journal of Applied Physics  
Mechanism of reversing the Neel domain walls in the Co nanostripes with transverse magnetic anisotropy Appl. Phys. Lett. 101, 252412 (2012) Structural and magnetic properties of biaxially textured NiFe2O4 thin films grown on c-plane sapphire J. Appl. Phys. 112, 123910 (2012) Thick CoFeB with perpendicular magnetic anisotropy in CoFeB-MgO based magnetic tunnel junction AIP Advances 2, 042182 (2012) Ferromagnetic enhancement and magnetic anisotropy in nonpolar-oriented (Mn, Na)-codoped ZnO thin
more » ... lms Appl. Phys. Lett. 101, 242401 (2012) The nature of Cr center in GaN: Magnetic anisotropy of GaN:Cr single crystals An all-optical pump-probe method was used to study magnetization precession in an epitaxial Co 2 MnAl Heusler alloy thin film. The frequency and amplitude of precession showed a clear fourfold variation as the orientation of the static field was applied in different directions within the plane of the film, revealing that the precession is induced by an ultrafast modification of the magnetocrystalline anisotropy field. The effective fields acting upon the magnetization have been determined and the damping parameter is found to decrease rapidly as the strength of the applied field is increased.
doi:10.1063/1.2711702 fatcat:gy6o5sn5czccdmzj5hthvjab54