Publication

Large area superconducting YBa2Cu3O7-x films grown by single target ion beam sputtering

Davor Pavuna
1991
Journal Articles

Abstract

The authors have demonstrated, by using a simple single YBa2Cu3O7-x target ion beam system that, with a sufficiently low power ion beam, preferential sputtering is avoided and high-quality YBa2Cu3O7-x films are deposited over areas larger than ≈30 cm2 in a reproducible way. As-deposited films on 〈100〉SrTiO3 are 50-100 nm thick, c-oriented and show the following reproducible electrical properties (within the given variations): Tc0=90±0.5 K, transitions widths less than 1 K, jc(77 K)=1.0-1.2×106 A cm-2, ρ(300 K)=300±50 μΩ cm, ρ(300 K)/ρ(100 K)=2.9±0.1. The extrapolated residual resistivity ρres(0 K) is between 0 and 5% of ρ(300 K)

Official source

https://infoscience.epfl.ch/entities/publication/f89f88f8-fa6c-4e7d-84a1-515f67a1e009

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Davor Pavuna
1991
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/f89f88f8-fa6c-4e7d-84a1-515f67a1e009

About this result

Related concepts (28)

Thin film

A thin film is a layer of material ranging from fractions of a nanometer (monolayer) to several micrometers in thickness. The controlled synthesis of materials as thin films (a process referred to as deposition) is a fundamental step in many applications. A familiar example is the household mirror, which typically has a thin metal coating on the back of a sheet of glass to form a reflective interface. The process of silvering was once commonly used to produce mirrors, while more recently the metal layer is deposited using techniques such as sputtering.

Electron-beam physical vapor deposition

Electron-beam physical vapor deposition, or EBPVD, is a form of physical vapor deposition in which a target anode is bombarded with an electron beam given off by a charged tungsten filament under high vacuum. The electron beam causes atoms from the target to transform into the gaseous phase. These atoms then precipitate into solid form, coating everything in the vacuum chamber (within line of sight) with a thin layer of the anode material.

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.

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Large area superconducting YBa2Cu3O7-x films grown by single target ion beam sputtering

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