Phase Diagrams of Ferromagnet-Superconductor Multilayers with Misaligned Exchange Fields

Details Phase Diagrams of Ferromagnet-Superconductor Multilayers with Misaligned Exchange Fields Phase Diagrams of Ferromagnet-Superconductor Multilayers with Misaligned Exchange Fields

2006-05-07

arxiv.org/abs/cond-mat/0605172v1

Phys. Rev. B 75, 014512 (2007)

Physics

Condensed Matter

Superconductivity

18 pages, 16 figures

Scientific paper

10.1103/PhysRevB.75.014512

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 state 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.

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