Magnetic properties changes of MnAs thin films irradiated with highly   charged ions
  We present the first investigation on the effect of highly charged ion bombardment on a manganese arsenide thin film. The MnAs films, 150 nm thick, are irradiated with 90 keV Ne$^{9+}$ ions with a dose varying from $1.6\times10^{12}$ to $1.6\times10^{15}$ ions/cm$^2$. The structural and magnetic properties of the film after irradiation are investigated using different techniques, namely, X-ray diffraction, magneto-optic Kerr effect and magnetic force microscope. Preliminary results are presented. From the study of the lattice spacing, we measure a change on the film structure that depends on the received dose, similarly to previous studies with other materials. Investigations on the surface show a strong modification of its magnetic properties. 
Martino Trassinelli (INSP), V. Gafton (INSP), M. Eddrief (INSP), V.H.   Etgens (INSP), S. Hidki (INSP), Emmanuelle Lacaze (I...
cond-mat.mtrl-sci physics.atom-ph