Dynamics and Critical Currents in Fast Superconducting Vortices at High pulsed Magnetic Fields

Measurements of nonlinear electrical transport at high magnetic fields provide critical insight into the physics of superconductors and other exotic electronic materials, with direct implications for magnet technology. However, such measurements in pulsed very high fields (the only option to exceed 45 T) have been thwarted by the short pulse durations and complex in-field dynamics. Using a rapid ``smart'' technique, the authors surmount the barriers to measuring superconducting critical current in very high magnetic fields. Exploring this uncharted region, they reveal the particular vortex dynamics induced by a rapidly varying field.