Superconductivity of Cu/CuO sub(x) interface formed by shock-wave pressure

A mixture of powdered Cu and CuO has been subjected to a shock-wave pressure of [Asymptotically = to]350 kbar with following quenching of the vacuum-encapsulated product to [approximate] 77 K. The ac magnetic susceptibility measurements of the samples have revealed metastable superconductivity with...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2014-03, Vol.498, p.54-58
Main Authors: Palnichenko, A V, Sidorov, N S, Shakhrai, D V, Avdonin, V V, Vyaselev, O M, Khasanov, S S
Format: Article
Language:English
Subjects:
Approximation
Asymptotic properties
Copper
COPPER OXIDE
Direct current
Dynamics
ELECTRICAL CONDUCTIVITY
INTERFACES
MAGNETIC PERMEABILITY
Magnetization
OXIDES
PERMEABILITY
PROPERTIES
Quenching
QUENCHING MECHANISMS
SUPERCONDUCTIVITY
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Summary:A mixture of powdered Cu and CuO has been subjected to a shock-wave pressure of [Asymptotically = to]350 kbar with following quenching of the vacuum-encapsulated product to [approximate] 77 K. The ac magnetic susceptibility measurements of the samples have revealed metastable superconductivity with T sub(c) [approximate] 19.5 K, characterized by glassy dynamics of the shielding currents below T sub(c). Comparison of the ac susceptibility and the dc magnetization measurements infers that the superconductivity arises within the granular interfacial layer formed between metallic Cu and its oxides due to the shock-wave treatment.
ISSN:0921-4534
DOI:10.1016/j.physc.2014.01.005