Magnetic screening in proximity-coupled superconductor/normal-metal bilayers

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.13659· OSTI ID:6836456

Pambianchi, M S; Mao, J; Anlage, S M ^[1]

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1. Center for Superconductivity Research, Physics Department, University of Maryland, College Park, Maryland 20742-4111 (United States)

The electrodynamics of a metallic surface layer in proximity contact to a superconductor are considered. The surface region is modeled as an idealized proximity-coupled superconductor/normal-metal ([ital S]/[ital N]) bilayer. Analytical expressions for the magnetic-field penetration into the sample are obtained. The behavior of the model and its applicability to magnetic-screening-length measurements on artificial and naturally occurring [ital S]/[ital N] bilayer superconductors are discussed in various limits. Calculations of the effective penetration depth [lambda][sub eff]([ital T]) reveal that unconventional penetration depth temperature dependences, such as [Delta][lambda][sub eff]([ital T])[similar to][ital T] found in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] crystals, are qualitatively reproduced with this model.

• OSTI ID: 6836456
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:18; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANALYTICAL SOLUTION
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELEMENTS
FILMS
MAGNETIC PROPERTIES
METALS
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PHYSICAL PROPERTIES
PROXIMITY EFFECT
SUPERCONDUCTING FILMS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES