Perpendicular Magnetic Anisotropy in Amorphous Ferromagnetic CoSiB/Pt Multilayers
Magnetic anisotropy properties of amorphous ferromagnetic CoSiB/Pt multilayers with perpendicular magnetic anisotropy (PMA, K
u) were systematically investigated as a function of CoSiB layer thickness (t
coSiB) and Pt layer thickness (t
Pt).
In two series of [CoSiB t
coSiB/Pt t
Pt]5 multilayers, the perpendicular coercivity (H
c) increased to reach a maximum and then decreased with further increase in both t
coSiB and t
Pt, 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 K
u of 2 × 106 erg/cc and a high H
c 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 H
c increased.
Keywords: COERCIVITY; COSIB; MAGNETIC MULTILAYERS; PERPENDICULAR MAGNETIC ANISOTROPY; THIN FILMS
Document Type: Research Article
Publication date: 01 January 2011
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