Reduced domain wall pinning in ultrathin Pt/ Co<sub>100-x</sub> B <sub>x</sub> /Pt with perpendicular magnetic anisotropy
- Lavrijsen, R.
- Malinowski, G.
- Franken, J.H.
- Kohlhepp, J.T.
- Swagten, H.J.M.
- Koopmans, B.
- Czapkiewicz, M.
- Stobiecki, T.
DOIAbstract
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
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