Possibility of periodically reentrant superconductivity in ferromagnet/superconductor layered structures

Journal Article · Mon Dec 01 00:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.R14283· OSTI ID:550559

Khusainov, M G; Proshin, Y N ^[1]

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1. Kazan State University, 420008 Kazan (Russia)

We develop the theory of the proximity effect in layered ferromagnetic metal/superconductor (F/S) structures taking into account finite transparency of the F/S interface as well as depression of the Cooper pairing and diffusionlike motion of conduction electrons by a strong exchange field of the ferromagnet. It is shown that the oscillatory dependence of the critical temperature on the F-layer thickness is due to a periodic modulation of the F/S boundary transparency by the oscillations of pair amplitude within the F layer. It is possible not only in the F/S multilayers, but in the F/S bilayers as well. The phenomena of reentrant and periodically reentrant superconductivity in the F/S contacts and superlattices are predicted. The competition between the {open_quotes}0{close_quotes} phase and {open_quotes}{pi}{close_quotes} phase types of superconductivity in the F/S multilayers is also discussed. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 550559
• Journal Information: Physical Review, B: Condensed Matter, Vol. 56, Issue 22; Other Information: PBD: Dec 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERROMAGNETIC MATERIALS
SUPERCONDUCTIVITY
COOPER PAIRS
PROXIMITY EFFECT
SUPERCONDUCTING FILMS
SUPERLATTICES
FERROMAGNETISM
TRANSITION TEMPERATURE
EXCHANGE INTERACTIONS