Perpendicular Magnetic Anisotropy in Amorphous Ferromagnetic CoSiB/Pt Multilayers
Authors: Hwang, J.Y.; Park, J.S.; Yim, H.I.; Kim, T.W.; Shin, D.Y.; Lee, S.B.
Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 1, January 2011 , pp. 856-859(4)
Publisher: American Scientific Publishers
Abstract:Magnetic anisotropy properties of amorphous ferromagnetic CoSiB/Pt multilayers with perpendicular magnetic anisotropy (PMA, Ku) were systematically investigated as a function of CoSiB layer thickness (tcoSiB) and Pt layer thickness (tPt). In two series of [CoSiB tcoSiB/Pt tPt]5 multilayers, the perpendicular coercivity (Hc) increased to reach a maximum and then decreased with further increase in both tcoSiB and tPt, due to intermixing of CoSiB/Pt interfaces. Particularly, using the amorphous soft magnetic CoSiB, the coercivity became very sensitive to the CoSiB thickness. These multilayer films exhibited a high Ku of 2 × 106 erg/cc and a high Hc of 360 Oe with marked squareness. It was found that even after annealing at 350 °C, the CoSiB/Pt multilayers had a high PMA and their Hc increased.
Document Type: Research article
Publication date: 2011-01-01
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