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Nb Lateral Josephson Junction Induced by Inverse Proximity Effect With NiFe

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4 Author(s)
Lin, L.K. ; Inst. of Phys., Acad. Sinica, Taipei, Taiwan ; Huang, S.Y. ; Huang, J.H. ; Lee, S.F.

We utilize the inverse proximity effect in superconductor-ferromagnet bilayer to generate lateral Josephson junctions. The weak link is created by a ferromagnetic NiFe strip across a superconductor Nb bridge due to the inverse proximity effect. The critical currents of the junctions were measured at different temperatures and magnetic fields. The junctions exhibit a modulation of the critical current in perpendicular magnetic field similar to a Fraunhofer interference pattern which proves the dc Josephson effect. The weak link region induced by the NiFe in Nb persists down to 2 K.

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Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )