Width of the 0-pi phase transition in diffusive magnetic Josephson junctions

Shomali, Zahra; Zareyan, Malek; Belzig, Wolfgang

Width of the 0-pi phase transition in diffusive magnetic Josephson junctions

Dateien

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Datum

2008

Autor:innen

Shomali, Zahra

Zareyan, Malek

Belzig, Wolfgang

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2008, 78, 214518. Available under: doi: 10.1103/PhysRevB.78.214518

Zusammenfassung

We investigate the Josephson current between two superconductors (S) which are connected through a diffusive magnetic junction with a complex structure (F-c). Using the quantum circuit theory, we obtain the phase diagram of 0 and pi Josephson couplings for F-c being an insulator-ferromagnet-insulator (IFI) double barrier junction or an IFNFI structure (where N indicates a normal-metal layer). Compared to a simple SFS structure, we find that the width of the transition, defined by the interval of exchange fields in which a 0-pi transition is possible, is increased by insulating barriers at the interfaces and also by the presence of the additional N layer. The widest transition is found for symmetric F-c structures. The symmetric SIFNFIS presents the most favorable condition to detect the temperature-induced 0-pi transition with a relative width, which is five times larger than that of the corresponding simple SFS structure.

Fachgebiet (DDC)

530 Physik

Schlagwörter

Josephson effect, phase diagrams, superconducting transitions

Zitieren

ISO 690

SHOMALI, Zahra, Malek ZAREYAN, Wolfgang BELZIG, 2008. Width of the 0-pi phase transition in diffusive magnetic Josephson junctions. In: Physical Review B. 2008, 78, 214518. Available under: doi: 10.1103/PhysRevB.78.214518

BibTex

@article{Shomali2008Width-1003,
  year={2008},
  doi={10.1103/PhysRevB.78.214518},
  title={Width of the 0-pi phase transition in diffusive magnetic Josephson junctions},
  volume={78},
  journal={Physical Review B},
  author={Shomali, Zahra and Zareyan, Malek and Belzig, Wolfgang},
  note={Article Number: 214518}
}

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Universitätsbibliographie

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