Nb Lateral Josephson Junction Induced by Inverse Proximity Effect With NiFe

Author

Lin, L.K. ; Huang, S.Y. ; Huang, J.H. ; Lee, S.F.

Author_Institution

Inst. of Phys., Acad. Sinica, Taipei, Taiwan

Volume

48

Issue

11

fYear

2012

Firstpage

4236

Lastpage

4238

Abstract

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.

Keywords

Josephson effect; critical currents; iron alloys; nickel alloys; superconducting critical field; Fraunhofer interference pattern; Nb; NiFe; critical currents; dc Josephson effect; ferromagnetic strip; inverse proximity effect; lateral Josephson junction; perpendicular magnetic field; superconductor bridge; superconductor-ferromagnet bilayer; weak link; Josephson junctions; Magnetic hysteresis; Magnetic tunneling; Niobium; Proximity effects; Superconducting magnets; Temperature measurement; Josephson junctions; superconducting materials measurements;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2198626

Filename

6332804