Experimental and simulation study of missing matching peaks in Nb thin films with square pinning arrays
R Cao, L Horng, TC Wu, JC Lin, JC Wu… - Journal of Applied …, 2011 - pubs.aip.org
Square arrays of circular pinning centers of various diameters were patterned in Nb thin
films to explore their vortex pinning behavior. Periodic critical current matching peaks and
some “missing peaks” were observed in magnetotransport measurements. The larger the
diameter of the pinning centers, the higher the index of the missing matching fields
observed. This phenomenon is explained by molecular dynamics simulations and is caused
by the interaction between interstitial vortices and vortices occupying the pinning centers.
films to explore their vortex pinning behavior. Periodic critical current matching peaks and
some “missing peaks” were observed in magnetotransport measurements. The larger the
diameter of the pinning centers, the higher the index of the missing matching fields
observed. This phenomenon is explained by molecular dynamics simulations and is caused
by the interaction between interstitial vortices and vortices occupying the pinning centers.
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