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arXiv · 1503.08999

Asymmetric magnetic bubble expansion under in-plane field in Pt/Co/Pt: effect of interface engineering

Reinoud Lavrijsen·Dion Hartmann·Arno van den Brink·Yuxiang Yin·Beatriz Barcones·Rembert Duine·Marcel Verheijen·Henk Swagten·Bert Koopmans
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Abstract

We analyse the impact of growth conditions on asymmetric magnetic bubble expansion under in-plane field in ultrathin Pt / Co / Pt films. Specifically, using sputter deposition we vary the Ar pressure during the growth of the top Pt layer. This induces a large change in the interfacial structure as evidenced by a factor three change in the effective perpendicular magnetic anisotropy. Strikingly, a discrepancy between the current theory for domain-wall propagation based on a simple domain-wall energy density and our experimental results is found. This calls for further theoretical development of domain-wall creep under in-plane fields and varying structural asymmetry.

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Reinoud Lavrijsen, Dion Hartmann, Arno van den Brink, Yuxiang Yin, Beatriz Barcones, Rembert Duine, Marcel Verheijen, Henk Swagten, Bert Koopmans. 2015-03-31. Asymmetric magnetic bubble expansion under in-plane field in Pt/Co/Pt: effect of interface engineering. https://doi.org/10.1103/physrevb.91.104414

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