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

V Shelukhin ; A Tsukernik ; M Karpovski ; Y Blum ; K.B Efetov ; A.F Volkov ; Thierry Champel ; Matthias Eschrig ; Tomas Löfwander (Institutionen för mikroteknologi och nanovetenskap) ; Gerd Schoen ; A Palevski
Physical Review B Vol. 73 (2006), p. 174506.
[Artikel, refereegranskad vetenskaplig]

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 pi phase shifts in these devices.



Denna post skapades 2007-01-16. Senast ändrad 2017-01-27.
CPL Pubid: 25634

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap

Ämnesområden

Den kondenserade materiens fysik

Chalmers infrastruktur