Magnetic Anisotropy of Co Films Annealed by Laser Pulses
The magnetic properties of an ultrathin cobalt film were modified by a focused femtosecond pulsed laser beam. The Co wedge, with a thickness ranging from 0 to 2 nm, sandwiched by Au films was prepared using ultra-high vacuum magnetron sputtering on a mica substrate. The modifications of the laser induced magnetic anisotropy were investigated using magneto-optic Kerr microscopy and MFM/AFM techniques. The laser induces: (i) local reorientation of magnetization from an in-plane to a perpendicular state and (ii) an increase of the coercivity field. A corresponding increase of the perpendicular magnetic anisotropy is discussed considering an improvement of the Co/Au interfaces.
Witold Łojkowski and John R. Blizzard
J. Kisielewski et al., "Magnetic Anisotropy of Co Films Annealed by Laser Pulses", Solid State Phenomena, Vol. 140, pp. 69-74, 2008