Publication

Electronic properties of superconducting (YBa2 Cu3O6.9)1-xAgx compounds

Helmuth Berger, Davor Pavuna
1988
Journal Articles

Abstract

We have studied electronic properties of (YBa2Cu3O6.9)1-xAgx compounds with 5, 10, 15, 25 and 50 wt% Ag. In our samples, the silver fills the intergranular space and the superconductivity is preserved even at 50 wt% Ag(Tc=87 K). These samples can be safely dropped in water without loss of superconductivity. The magnitude of electrical resistivity at 300 K rapidly decreases from 103 μΩcm for 5 wt% Ag down to approximately 30 μΩcm for 50 wt% Ag. The superconducting transition is always around 92 K. Preliminary measurements on the samples with 5 wt% Ag indicate at least factor of 2 improvement in the critical current.

Official source

https://infoscience.epfl.ch/entities/publication/9de8e629-12ee-4fb4-b6d4-6370e2ff9e7d

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Helmuth Berger, Davor Pavuna
1988
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9de8e629-12ee-4fb4-b6d4-6370e2ff9e7d

About this result

Related concepts (32)

Superconductivity

Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic fields are expelled from the material. Any material exhibiting these properties is a superconductor. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered, even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero.

High-temperature superconductivity

High-temperature superconductors (abbreviated high-Tc or HTS) are defined as materials with critical temperature (the temperature below which the material behaves as a superconductor) above , the boiling point of liquid nitrogen. They are only "high-temperature" relative to previously known superconductors, which function at even colder temperatures, close to absolute zero. The "high temperatures" are still far below ambient (room temperature), and therefore require cooling.

Superconducting wire

Superconducting wires are electrical wires made of superconductive material. When cooled below their transition temperatures, they have zero electrical resistance. Most commonly, conventional superconductors such as niobium–titanium are used, but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.

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