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Phase diagrams of ferromagnet-superconductor multilayers with misaligned exchange fields

Tomas Löfwander (Institutionen för mikroteknologi och nanovetenskap, Bionanosystem) ; Thierry Champel ; Matthias Eschrig
Physical Review B Vol. 75 (2007), p. 014512.
[Artikel, refereegranskad vetenskaplig]

We study the influence of misalignment of the ferromagnetic exchange field on the equilibrium properties of hybrid structures, composed of superconducting (S) and ferromagnetic (F) parts. In particular, we study numerically the superconducting critical temperature Tc in F-S-F trilayers and in F-S-F-S-F Josephson junctions as a function of the misalignment angle theta of the ferromagnetic magnetization. We discuss the corresponding phase diagrams for these hybrid structures. For the Josephson junctions, a transition between the zero-phase and the pi-phase ground states as a function of theta takes place under certain conditions. Within the quasiclassical Green's function technique in the diffusive limit, we introduce a fast and effective method for calculating Tc in such multilayer structures.

Denna post skapades 2007-01-16. Senast ändrad 2009-02-16.
CPL Pubid: 25630


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Bionanosystem (2007-2015)


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Chalmers infrastruktur