Phase diagrams of ferromagnet-superconductor multilayers with misaligned exchange fields

Tomas Löfwander; Thierry Champel; Matthias Eschrig

doi:10.1103/PhysRevB.75.014512

← Back to search

Phase diagrams of ferromagnet-superconductor multilayers with misaligned exchange fields

Tomas Löfwander, Thierry Champel, Matthias Eschrig

DOI 10.1103/PhysRevB.75.014512 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

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 θ 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 π-phase ground states as a function of θ 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.