Journal article
Selective Modification of Magnetic Properties of Co₀/Au/Co₂/Au Multilayers by He Ion Bombardment
Publication Details
Authors: | Urbaniak, M.; Stobiecki, F.; Engel, D.; Szymanski, B.; Ehresmann, A. |
Publication year: | 2009 |
Journal: | Acta Physica Polonica A |
Pages range : | 326-328 |
Volume number: | 115 |
Start page: | 326 |
End page: | 328 |
ISSN: | 0587-4246 |
Abstract
We show that in a [Co1/Au/Co2/Au]4 multilayer, where Co1(2) denote Co layers of different thicknesses, a 10 keV He-ion bombardment with a 6 x 1014 ions/cm2 dose leads to changes of the easy direction from out-of-plane to in-plane in the thicker Co layers (tCo2 = 1 nm) while the perpendicular anisotropy of the thinner Co layers (tCo1 = 0.6 nm) is preserved. The investigated multilayers were obtained by sputtering and the thickness of the Au layers (tAu = 4 nm) ensured that a direct coupling between the Co layers (through pinholes) and Ruderman-Kittel-Kasuya-Yosida-like interactions were negligible.
We show that in a [Co1/Au/Co2/Au]4 multilayer, where Co1(2) denote Co layers of different thicknesses, a 10 keV He-ion bombardment with a 6 x 1014 ions/cm2 dose leads to changes of the easy direction from out-of-plane to in-plane in the thicker Co layers (tCo2 = 1 nm) while the perpendicular anisotropy of the thinner Co layers (tCo1 = 0.6 nm) is preserved. The investigated multilayers were obtained by sputtering and the thickness of the Au layers (tAu = 4 nm) ensured that a direct coupling between the Co layers (through pinholes) and Ruderman-Kittel-Kasuya-Yosida-like interactions were negligible.
