Observation of periodic π-phase shifts in ferromagnet-superconductor multilayers

V. Shelukhin; A. Tsukernik; M. Karpovski; Y. Blum; K. B. Efetov; A. F. Volkov; T. Champel; M. Eschrig; T. Löfwander; G. Schön; A. Palevski

doi:10.1103/PhysRevB.73.174506

Observation of periodic π-phase shifts in ferromagnet-superconductor multilayers

V. Shelukhin^*, A. Tsukernik, M. Karpovski, Y. Blum, K. B. Efetov, A. F. Volkov, T. Champel, M. Eschrig, T. Löfwander, G. Schön, A. Palevski

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract

We report complementary studies of the critical temperature and the critical current in ferromagnet (Ni) - superconductor (Nb) multilayers. The observed oscillatory behavior of both quantities upon variation of the thickness of the ferromagnetic layer is found to be in good agreement with theory. The length scale of oscillations is identical for both quantities and is set by the magnetic length corresponding to an exchange field of 200 meV in Ni. The consistency between the behavior of the two quantities provides strong evidence for periodic π phase shifts in these devices.

Original language	English
Article number	174506
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	73
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.73.174506
State	Published - 2006

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Shelukhin, V., Tsukernik, A., Karpovski, M., Blum, Y., Efetov, K. B., Volkov, A. F., Champel, T., Eschrig, M., Löfwander, T., Schön, G., & Palevski, A. (2006). Observation of periodic π-phase shifts in ferromagnet-superconductor multilayers. Physical Review B - Condensed Matter and Materials Physics, 73(17), Article 174506. https://doi.org/10.1103/PhysRevB.73.174506

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abstract = "We report complementary studies of the critical temperature and the critical current in ferromagnet (Ni) - superconductor (Nb) multilayers. The observed oscillatory behavior of both quantities upon variation of the thickness of the ferromagnetic layer is found to be in good agreement with theory. The length scale of oscillations is identical for both quantities and is set by the magnetic length corresponding to an exchange field of 200 meV in Ni. The consistency between the behavior of the two quantities provides strong evidence for periodic π phase shifts in these devices.",

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AU - Shelukhin, V.

AU - Tsukernik, A.

AU - Karpovski, M.

AU - Blum, Y.

AU - Efetov, K. B.

AU - Volkov, A. F.

AU - Champel, T.

AU - Eschrig, M.

AU - Löfwander, T.

AU - Schön, G.

AU - Palevski, A.

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N2 - We report complementary studies of the critical temperature and the critical current in ferromagnet (Ni) - superconductor (Nb) multilayers. The observed oscillatory behavior of both quantities upon variation of the thickness of the ferromagnetic layer is found to be in good agreement with theory. The length scale of oscillations is identical for both quantities and is set by the magnetic length corresponding to an exchange field of 200 meV in Ni. The consistency between the behavior of the two quantities provides strong evidence for periodic π phase shifts in these devices.

AB - We report complementary studies of the critical temperature and the critical current in ferromagnet (Ni) - superconductor (Nb) multilayers. The observed oscillatory behavior of both quantities upon variation of the thickness of the ferromagnetic layer is found to be in good agreement with theory. The length scale of oscillations is identical for both quantities and is set by the magnetic length corresponding to an exchange field of 200 meV in Ni. The consistency between the behavior of the two quantities provides strong evidence for periodic π phase shifts in these devices.

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Observation of periodic π-phase shifts in ferromagnet-superconductor multilayers

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