Intrinsically frustrated superconducting array of superconductor-ferromagnet-superconductor π junctions
作者： V. V. Ryazanov , V. A. Oboznov , A. V. Veretennikov , A. Yu. Rusanov
DOI: 10.1103/PHYSREVB.65.020501
关键词:
摘要: We report a direct observation of the transition superconductor-ferromagnet-superconductor (SFS) junctions to \ensuremath{\pi} state. This manifests itself in half-period shift external magnetic field dependence transport critical current triangular SFS arrays. The is associated with appearance spontaneous supercurrents array at zero field, ground state degenerated respect two possible flow directions. In conventional Josephson arrays this can be observed only by imposing frustrating equal half-integer number flux quanta per cell.
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