[Show abstract][Hide abstract] ABSTRACT: During experiments carried out to find out a suitable contact metal for electronic components based on high-Tc superconductor films (YBaCuO), it is observed that there is an asymmetry in the U–I characteristics if the two contacts are made of different metals. The asymmetry is more pronounced if one of the contact metals is aluminium. The asymmetry is lowest if one of the contact metals is silver and the other gold.
No preview · Article · Apr 1994 · physica status solidi (a)
[Show abstract][Hide abstract] ABSTRACT: This note describes a bidirectional clipper based on the properties of the critical current associated with a superconductor. The new device has been tested using high Tc superconductors.
[Show abstract][Hide abstract] ABSTRACT: This paper aims at describing a low-temperature thermal sensor based on superconductor films which can be designed to have required variation of resistance with temperature through an appropriate geometry. Further, it has been shown that the temperature range can be varied to some extent by controlling the bias current.
No preview · Article · Nov 1991 · Review of Scientific Instruments
[Show abstract][Hide abstract] ABSTRACT: The characteristics of Y-Ba-Cu-O superconducting films, prepared on alumina substrates with an intermediate layer of thick
film high-temperature silver paste, are studied. It is found that the critical current density of the film has improved, perhaps
due to the prevention of interactions between alumina and the superconducting film by the intermediate layer.
No preview · Article · Jan 1991 · Journal of Materials Science
[Show abstract][Hide abstract] ABSTRACT: This note attempts to describe a current controlled variable resistor conceived based on the property of critical current associated with a superconductor. This idea has been tested using high‐temperature superconductor films.
No preview · Article · Aug 1989 · Review of Scientific Instruments
[Show abstract][Hide abstract] ABSTRACT: Current-voltage (I–U) characteristics of MOS structures on polycrystalline silicon are investigated. A model based on the carrier transport through the traps in the oxide is described to explain the I–U characteristics.Es werden Strom-Spannungs(I–U)-Charakteristiken von MOS-Strukturen auf polykristallinem Silizium untersucht. Ein Modell zur Erklärung der I–U-Charakteristiken wird beschrieben, das auf dem Ladungstransport über Oxidtraps beruht.
No preview · Article · Feb 1989 · physica status solidi (a)
[Show abstract][Hide abstract] ABSTRACT: This letter attempts to examine the impact of the chemical interaction of the alumina substrate on the Y-Ba-Cu-O film deposited on it. These experiments indicate that the production of superconducting films on alumina substrates by screen printing depends critically on the process conditions, especially on the annealing time at the normal annealing temperature, i.e. at 1000°C. The annealing time required is expected to depend on the thickness of the film and should be so chosen that the substrate reaction does not reach the superconducting layer within the annealing period. Thus this technique of growing superconducting films on alumina substrates provides a method for producing superconducting films with low critical currents, which may be needed for electronic components based on superconductors.
No preview · Article · Feb 1989 · Journal of Physics D Applied Physics
[Show abstract][Hide abstract] ABSTRACT: This paper reports the variations in impedance with frequency of metal‐oxide‐semiconductor (MOS) structures on polycrystalline silicon. The origin of these impedance‐frequency characteristics are qualitatively explained. These characteristics indicate that the MOS structure on polycrystalline silicon can be exploited to realize voltage controlled filters.
No preview · Article · Feb 1988 · Journal of Applied Physics