Ginzburg-Landau theory of superconductor-ferromagnet heterostructures

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Journal of Low Temperature Physics; (United States)

DOI:https://doi.org/10.1007/BF00126600· OSTI ID:7171099

Schinz, H; Schwabl, F ^[1]

---

1. Technischen Univ. Muenchen, Garching (Germany)

On the basis of a Ginzburg-Landau theory for two coupled order parameters, the authors investigate heterostructures of superconducting and ferromagnetic materials coupled via the proximity effect. They study a bilayer and a sandwich-like geometry both extending to infinity. Without an external magnetic field but fully taking into account the nonlinearities, they obtain phase diagrams and temperature dependent order parameter profiles as well as corresponding free energies. In this mean field, they find reentrant behavior and the occurrence of first order phase transitions. They also derive relationships between different geometries.

• OSTI ID: 7171099
• Journal Information: Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 88:5-6; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
DIAGRAMS
FERROMAGNETIC MATERIALS
GINZBURG-LANDAU THEORY
MAGNETIC MATERIALS
MATERIALS
MEAN-FIELD THEORY
MORPHOLOGY
ORDER PARAMETERS
PHASE DIAGRAMS
PROXIMITY EFFECT
SUPERCONDUCTORS