Some Scanning Hall Probe Movies of Vortex Dynamics in

BSCCO (2212) Single Crystals under Tilted Magnetic Fields.

(Movies prepared by Dr A N Grigorenko, A.Grigorenko@plymouth.ac.uk)

(i) Vortex Pumps

pump1.avi

Motion for Josephson vortex stacks as H_a-b is reduced from 30Oe to 0Oe at 77K, H_z=10Oe.

Motion of Josephson vortex stacks as H_a-b is cycled from 0Oe to 55Oe and back to 0Oe at 81K.

Note how the stacks of Josephson vortices ‘vacuum up’ the pancake vortices as they move.

(ii) Melting of the Vortex Solid without and with and in-plane Magnetic Field

Melting of the vortex solid as H_z is increased from H_z=0Oe in the absence of Josephson vortices at 81K.

Note how quenched disorder leads to spatially inhomogeneous melting.

Melting of the pancake vortex solid as H_z is increased from H_z=0Oe in the presence of Josephson vortices.

H_a-b=34Oe, T=81K.

(iii) Pancake Vortex Penetration along 1D Chains

Penetration of pancake vortices along Josephson vortex stacks as H_z is increased at 81K, H_a-b=35Oe.

(iv) Sublimation of 1D Vortex Chains at very high Tilt Angles

'Sublimation' and ‘crystallisation’ of 1D pancake vortex chains as H_z is cycled around H_z=0Oe at 83K,

H_a-b=38Oe.