Mapping the dynamic interactions between vortex species in highly   anisotropic superconductors
  Here we use highly sensitive magnetisation measurements performed using a Hall probe sensor on single crystals of highly anisotropic high temperature superconductors $Bi_{2}Sr_{2}CaCu_{2}O_{8}$ to study the dynamic interactions between the two species of vortices that exist in such superconductors. We observe a remarkable and clearly delineated high temperature regime that mirrors the underlying vortex phase diagram. Our results map out the parameter space over which these dynamic interaction processes can be used to create vortex ratchets, pumps and other fluxonic devices. 
M. Tesei (1), G. K. Perkins (1), A. D. Caplin (1), L. F. Cohen (1) and   T. Tamegai (2) ((1) The Blackett Laboratory, Imperi...