Theory of 0-π transition in a superconductor/ferromagnet/superconductor junction

Shin ichi Hikino; Michiyasu Mori; Saburo Takahashi; Sadamichi Maekawa

doi:10.1016/j.jmmm.2006.11.010

Theory of 0-π transition in a superconductor/ferromagnet/superconductor junction

Shin ichi Hikino, Michiyasu Mori, Saburo Takahashi, Sadamichi Maekawa

Materials Property Division

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

We study the 0-π transition by taking into account magnetic scattering in a dirty ferromagnet (FM). Using the fourth order perturbation theory for the tunneling Hamiltonian and Green's function method, we formulate the Josephson effect in a SC/FM/SC junction, where SC is a superconductor. It is found that Josephson critical current shows the damped oscillation as a function of the thickness of the ferromagnet and the 0-π transition occurs. Moreover, it is found that the 0-π transition occurs by changing temperature due to the magnetic scattering.

Original language	English
Pages (from-to)	2456-2458
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 3
DOIs	https://doi.org/10.1016/j.jmmm.2006.11.010
Publication status	Published - 2007 Mar 1

Keywords

Ferromagnet
Josephson effect
Nanostructure
Superconductor
Tunnel junction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Theory of 0-π transition in a superconductor/ferromagnet/superconductor junction",

abstract = "We study the 0-π transition by taking into account magnetic scattering in a dirty ferromagnet (FM). Using the fourth order perturbation theory for the tunneling Hamiltonian and Green's function method, we formulate the Josephson effect in a SC/FM/SC junction, where SC is a superconductor. It is found that Josephson critical current shows the damped oscillation as a function of the thickness of the ferromagnet and the 0-π transition occurs. Moreover, it is found that the 0-π transition occurs by changing temperature due to the magnetic scattering.",

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T1 - Theory of 0-π transition in a superconductor/ferromagnet/superconductor junction

AU - Hikino, Shin ichi

AU - Mori, Michiyasu

AU - Takahashi, Saburo

AU - Maekawa, Sadamichi

PY - 2007/3/1

Y1 - 2007/3/1

N2 - We study the 0-π transition by taking into account magnetic scattering in a dirty ferromagnet (FM). Using the fourth order perturbation theory for the tunneling Hamiltonian and Green's function method, we formulate the Josephson effect in a SC/FM/SC junction, where SC is a superconductor. It is found that Josephson critical current shows the damped oscillation as a function of the thickness of the ferromagnet and the 0-π transition occurs. Moreover, it is found that the 0-π transition occurs by changing temperature due to the magnetic scattering.

AB - We study the 0-π transition by taking into account magnetic scattering in a dirty ferromagnet (FM). Using the fourth order perturbation theory for the tunneling Hamiltonian and Green's function method, we formulate the Josephson effect in a SC/FM/SC junction, where SC is a superconductor. It is found that Josephson critical current shows the damped oscillation as a function of the thickness of the ferromagnet and the 0-π transition occurs. Moreover, it is found that the 0-π transition occurs by changing temperature due to the magnetic scattering.

KW - Ferromagnet

KW - Josephson effect

KW - Nanostructure

KW - Superconductor

KW - Tunnel junction

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