Reduced domain wall pinning in ultrathin Pt/Co100-xBx/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.
January 2010
Applied Physics Letters;1/11/2010, Vol. 96 Issue 2, p022501
Academic Journal
We have studied the magnetization reversal process in perpendicularly magnetized ultrathin Pt/Co100-xBx/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-xBx/Pt could be an interesting candidate for domain-wall motion studies and applications.


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