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Reduced domain wall pinning in ultrathin Pt/ Co100-x B x /Pt with perpendicular magnetic anisotropy

By R. Lavrijsen, G. Malinowski, J.H. Franken, J.T. Kohlhepp, H.J.M. Swagten, B. Koopmans, M. Czapkiewicz and T. Stobiecki

Abstract

We have studied the magnetization reversal process in perpendicularly magnetized ultrathin Pt/ Co100-x Bx /Pt films by means of magneto-optical magnetometry and microscopy. The addition of boron enhances the effective Barkhausen volume indicating a decrease in domain-wall pinning site density and/or strength. This potentially reduces the field and critical current-density for domain-wall depinning/motion, indicating that perpendicularly magnetized Pt/ Co100-x Bx /Pt could be an interesting candidate for domain-wall motion studies and applications

Year: 2010
DOI identifier: 10.1063/1.3280373
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Provided by: NARCIS
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