Velocity measurements of the dendritic instability in Y Ni2B2C

Wc measured the velocity of Ihc flux front of an artificially nucleated dendritic instability in YNi2B2C. The required time resolution In the nanosecond regime was achieved by our magneto-optic pumpprobe technique, utilizing a femtosecond laser system. The penetration vclocity of the flux front is on the order of 360 km s-'. (Some figurcs in this article are in colour onIy in the electronic version)