Superconducting current in hybrid structures with an antiferromagnetic interlayer

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776110020172· OSTI ID:21443405

Ovsyannikov, G A; Kislinskii, Yu V; Shadrin, A V; Borisenko, I V; Komissinskiy, P V ^[1]

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1. Russian Academy of Sciences, Kotel'nikov Institute of Radio Engineering and Electronics (Russian Federation)

It is shown experimentally that the superconducting current density in Nb/Au/Ca{sub 1-x}Sr{sub x}CuO{sub 2}/YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} hybrid superconducting heterostructures with a Ca{sub 1-x}Sr{sub x}CuO{sub 2} anti-ferromagnetic (AF) cuprate interlayer is anomalously high for interlayer thicknesses d{sub M} = 10-50 nm and the characteristic damping length for superconducting correlations is on the order of 10 nm. The experimental results are explained on the basis of theoretical analysis of a junction of two superconductors (S' and S) connected by a magnetic multilayer with the AF ordering of magnetization in the layers. It is shown that with such a magnetization ordering, anomalous proximity effect determined by the singlet component of the condensate wavefunction may take place. As a result, the critical currents in S'/I/AF/S and S'/I/N/S structures (I denotes an insulator, and N, the normal metal) may coincide in order of magnitude even when the thickness of the AF interlayer considerably exceeds the decay length of the condensate wavefunction in ferromagnetic layers.

• OSTI ID: 21443405
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 110, Issue 2; Other Information: DOI: 10.1134/S1063776110020172; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
CORRELATIONS
CRITICAL CURRENT
CURRENT DENSITY
DAMPING
GOLD
HETEROJUNCTIONS
HIGH-TC SUPERCONDUCTORS
LAYERS
MAGNETIZATION
NIOBIUM
PROXIMITY EFFECT
WAVE FUNCTIONS
YTTRIUM COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
FUNCTIONS
MAGNETISM
METALS
REFRACTORY METALS
SEMICONDUCTOR JUNCTIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TYPE-II SUPERCONDUCTORS