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

Keywords

Ferromagnet
Josephson effect
Nanostructure
Superconductor
Tunnel junction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2006.11.010

Cite this

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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.",

keywords = "Ferromagnet, Josephson effect, Nanostructure, Superconductor, Tunnel junction",

author = "Hikino, {Shin ichi} and Michiyasu Mori and Saburo Takahashi and Sadamichi Maekawa",

note = "Funding Information: This work was supported by (a Grant-in-Aid for Scientific Research on Priority Areas and) NAREGI Nanoscience Project and CREST. One of the authors (M.M.) acknowledges support by the 21st Century COE program, Tohoku University, Materials Research Center and Kakenhi Wakate (B) from MEXT.",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.11.010",

language = "English",

volume = "310",

pages = "2456--2458",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "2 SUPPL. PART 3",

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TY - JOUR

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

N1 - Funding Information: This work was supported by (a Grant-in-Aid for Scientific Research on Priority Areas and) NAREGI Nanoscience Project and CREST. One of the authors (M.M.) acknowledges support by the 21st Century COE program, Tohoku University, Materials Research Center and Kakenhi Wakate (B) from MEXT.

PY - 2007/3

Y1 - 2007/3

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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U2 - 10.1016/j.jmmm.2006.11.010

DO - 10.1016/j.jmmm.2006.11.010

M3 - Article

AN - SCOPUS:33847620762

VL - 310

SP - 2456

EP - 2458

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 2 SUPPL. PART 3

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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