The effect of normal and insulating layers on 0-πtransitions in Josephson junctions with a ferromagnetic barrier

Heim, D.M., Pugach, N.G., Kupriyanov, M. Y., Goldobin, E., Koelle, D., Kleiner, R., Ruppelt, N., Weides, M. and Kohlstedt, H. (2015) The effect of normal and insulating layers on 0-πtransitions in Josephson junctions with a ferromagnetic barrier. New Journal of Physics, 17(11), 113022. (doi: 10.1088/1367-2630/17/11/113022)

Abstract

Using the Usadel approach, we provide a formalism that allows us to calculate the critical current density of 21 different types of Josephson junctions (JJs) with a ferromagnetic (F) barrier and additional insulating (I) or/and normal (N) layers inserted between the F layer and superconducting (S) electrodes. In particular, we obtain that in SFS JJs, even a thin additional N layer between the S layer and F layer may noticeably change the thickness ${d}_{{\rm{F}}}$ of the F layer at which the 0-π transitions occur. For certain values of ${d}_{{\rm{F}}},$ a 0-π transition can even be achieved by changing only the N layer thickness. We use our model to fit experimental data of SIFS and SINFS tunnel junctions.

• Item Type: Articles
• Additional Information: Financial support by the DFG(Projects SFB/TRR-21 and KO 1953/11-1) and Open Access Publishing Fund of the University of Tübingen, the EPSRC (grant No. EP/J010618/1), the Russian Foundation for Basic Researches(RFBR grants Nos 13-02-01452-a, 14- 02-90018-Bel-a) and the Ministry of Education and Science of Russian Federation (grant No. 14Y26.31.0007) is gratefully acknowledged.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Weides, Professor Martin
• Authors: Heim, D.M., Pugach, N.G., Kupriyanov, M. Y., Goldobin, E., Koelle, D., Kleiner, R., Ruppelt, N., Weides, M., and Kohlstedt, H.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: New Journal of Physics
• Publisher: IOP Publishing
• ISSN: 1367-2630
• ISSN (Online): 1367-2630
• Copyright Holders: Copyright © 2015 IOP Publishing Ltd.
• First Published: First published in New Journal of Physics 17:113022
• Publisher Policy: Reproduced under a Creative Commons License