Planar S-(S/F)-S Josephson junctions induced by the inverse proximity effect

O. Vávra; W. Pfaff; Ch Strunk

doi:10.1063/1.3200226

Planar S-(S/F)-S Josephson junctions induced by the inverse proximity effect

O. Vávra, W. Pfaff, Ch Strunk

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Abstract

We present a utilization of the inverse proximity effect in superconductor-ferromagnet (S-F) bilayer to generate lateral Josephson junctions. The weak link is created by a Pd_0.95 Fe_0.05 strip across a Nb bridge. Close to T_C and in perpendicular magnetic field the junctions exhibit a modulation of the critical current I_C (B) similar to a Fraunhofer interference pattern which proves the dc Josephson effect. The structure contains three weak links (two different areas) in series which result in the observation of two periods scalable with the areas penetrated by magnetic flux. Measurements of Shapiro steps prove the presence of the ac Josephson effect.

Original language	English (US)
Article number	062501
Journal	Applied Physics Letters
Volume	95
Issue number	6
DOIs	https://doi.org/10.1063/1.3200226
State	Published - 2009
Externally published	Yes

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Physics and Astronomy (miscellaneous)

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10.1063/1.3200226

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title = "Planar S-(S/F)-S Josephson junctions induced by the inverse proximity effect",

abstract = "We present a utilization of the inverse proximity effect in superconductor-ferromagnet (S-F) bilayer to generate lateral Josephson junctions. The weak link is created by a Pd0.95 Fe0.05 strip across a Nb bridge. Close to TC and in perpendicular magnetic field the junctions exhibit a modulation of the critical current IC (B) similar to a Fraunhofer interference pattern which proves the dc Josephson effect. The structure contains three weak links (two different areas) in series which result in the observation of two periods scalable with the areas penetrated by magnetic flux. Measurements of Shapiro steps prove the presence of the ac Josephson effect.",

author = "O. V{\'a}vra and W. Pfaff and Ch Strunk",

note = "Funding Information: The authors would like to thank Z. Radovi{\'c}, {\v S}. Ga{\v z}i, and {\v S}. Be{\v n}a{\v c}ka for fruitful discussions. This work is supported by the German Science Foundation within Contract No. SFB 689.",

year = "2009",

doi = "10.1063/1.3200226",

language = "English (US)",

volume = "95",

journal = "Applied Physics Letters",

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T1 - Planar S-(S/F)-S Josephson junctions induced by the inverse proximity effect

AU - Vávra, O.

AU - Pfaff, W.

AU - Strunk, Ch

N1 - Funding Information: The authors would like to thank Z. Radović, Š. Gaži, and Š. Beňačka for fruitful discussions. This work is supported by the German Science Foundation within Contract No. SFB 689.

PY - 2009

Y1 - 2009

N2 - We present a utilization of the inverse proximity effect in superconductor-ferromagnet (S-F) bilayer to generate lateral Josephson junctions. The weak link is created by a Pd0.95 Fe0.05 strip across a Nb bridge. Close to TC and in perpendicular magnetic field the junctions exhibit a modulation of the critical current IC (B) similar to a Fraunhofer interference pattern which proves the dc Josephson effect. The structure contains three weak links (two different areas) in series which result in the observation of two periods scalable with the areas penetrated by magnetic flux. Measurements of Shapiro steps prove the presence of the ac Josephson effect.

AB - We present a utilization of the inverse proximity effect in superconductor-ferromagnet (S-F) bilayer to generate lateral Josephson junctions. The weak link is created by a Pd0.95 Fe0.05 strip across a Nb bridge. Close to TC and in perpendicular magnetic field the junctions exhibit a modulation of the critical current IC (B) similar to a Fraunhofer interference pattern which proves the dc Josephson effect. The structure contains three weak links (two different areas) in series which result in the observation of two periods scalable with the areas penetrated by magnetic flux. Measurements of Shapiro steps prove the presence of the ac Josephson effect.

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Planar S-(S/F)-S Josephson junctions induced by the inverse proximity effect

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