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AC Current Driven Dynamic Vortex State in YBa2Cu3O7-x (Postprint)
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIR/POWER DIV/MECHANICAL ENERGY CONVERSION BRANCH
Pagination or Media Count:
Time-resolved magneto-optical imaging measurements show that an ac current enables the vortex matter in YBa2Cu3O7-x thin films to reorganize into two coexisting steady states of driven vortex motion with different characteristics a quasi-static disordered glassy state in the sample interior and a dynamic state of plastic motion near the edges. Finite element calculations consistent with the critical state model show good agreement with the measured field profiles in the quasi-static state but predict a larger hysteretic behavior in the dynamic state.
APPROVED FOR PUBLIC RELEASE