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

R. Lavrijsen, D.M.F. Hartmann, A. Brink, van den, Y. Yin, B. Barcones Campo, R.A. Duine, M.A. Verheijen, H.J.M. Swagten, B. Koopmans

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73 Citations (Scopus)
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Abstract

We analyze the impact of growth conditions on the asymmetric magnetic bubble expansion under an 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.
Original languageEnglish
Pages (from-to)104414-
Number of pages8
JournalPhysical Review B
Volume91
DOIs
Publication statusPublished - 2015

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