Pattern induced phase transition of vortex motion in high-Tc films

Wördenweber, R.; Hollmann, E.; Schubert, J.; Kutzner, R.; Ghosh, Ajay Kumar
May 2009
Applied Physics Letters;5/18/2009, Vol. 94 Issue 20, p202501
Academic Journal
A micropattern induced transition in the mechanism of vortex motion and vortex mobility is demonstrated for high-Tc films. The competition between the anomalous Hall effect and the guidance of vortices by rows of microholes (antidots) leads to a sudden change in the direction of vortex motion that is accompanied by a change of the critical current density and microwave losses. The latter demonstrates the difference in vortex mobility in the different phases of vortex motion in between and within the rows of antidots.


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