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, 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: PERPENDICULAR MAGNETIC ANISOTROPY; COSIB; MAGNETIC MULTILAYERS; THIN FILMS; COERCIVITY

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2011.3236

Publication date: 2011-01-01

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