Swift ion irradiation of magnetostrictive multilayers

Jean Juraszek (1) , A. Grenier (1) , J. Teillet (1) , Nicolas Tiercelin (2) , F. Petit (3) , Jamal Ben Youssef (3) , Marcel Toulemonde (4)

1 GPM - Groupe de physique des matériaux
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
3 LMB - Laboratoire de magnétisme de Bretagne
4 GANIL - Grand Accélérateur National d'Ions Lourds

The modification of the magnetic and magnetostrictive properties of TbFe2/Co exchange-coupled multilayers irradiated with 700 MeV Pb ions was investigated as a function of ion fluence. After irradiation, the magnetostrictive properties of the sample are first strongly improved up to a fluence of 1 × 1012 ions cm−2 where the magnetoelastic susceptibility is six times higher than for the as-deposited sample. This effect is ascribed to stress relaxation and Fe–Co intermixing at the interfaces. For higher fluences, the magnetostrictive properties do not vary further, indicating a stationary state of mixing.

Domaines: Physique [physics]; Matière Condensée [cond-mat]

Jean Juraszek, A. Grenier, J. Teillet, Nicolas Tiercelin, F. Petit, et al.. Swift ion irradiation of magnetostrictive multilayers. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2006, 245 (1), pp.157-160. ⟨10.1016/j.nimb.2005.11.093⟩. ⟨hal-01946418⟩