Perpendicular Magnetic Anisotropy in Amorphous Ferromagnetic CoSiB/Pt Multilayers

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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.

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

Document Type: Research Article

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

Publication date: January 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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