Spin reorientation transitions in Pt/Co/Pt films under low dose Ga+ ion irradiation

Jaworowicz, J.; Maziewski, A.; Mazalski, P.; Kisielewski, M.; Sveklo, I.; Tekielak, M.; Zablotskii, V.; Ferré, J.; Vernier, N.; Mougin, A.; Henschke, A.; Fassbender, J.
July 2009
Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p022502
Academic Journal
An elegant route for tuning the magnetic anisotropy of ultrathin Co films by Ga+ ion irradiation is presented. The magnetic anisotropy of a Pt/Co(2.6 nm)/Pt film is first changed from in-plane to out-of-plane by uniform low dose Ga+ ion irradiation at 30 keV. When increasing the dose, a second spin reorientation transition toward the sample plane is also evidenced. This could be a way to design magnetic nanowires with perpendicular anisotropy, embedded in an in-plane magnetized environment, either by irradiation through a mask or focused ion beam. Tentative explanations on the origin of these two successive spin reorientations are proposed.


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