Publication

Effects of Cu substitution by Zn on transport properties of Y1Ba2Cu3O7-δ

Davor Pavuna
1989
Journal Articles

Abstract

The authors report the temperature dependence of resistivity and the Hall coefficient RH of a series of Y1Ba2(Cu1-xZnx)3O7-δ ceramics with x up to 0.075. In all their samples they have observed linear temperature dependence of (eRH)-1. The slope, d(eRH)-1/dT, decreases with the increase in Zn concentration, while the intercept (eRH)-1 at T⇒0 increases. These changes, together with a decrease of α=(∂ρ/∂T)ρ-1 due also to the Cu substitution, provokes the flattening in the temperature dependence of the Hall mobility. The analysis of the data shows that one cannot consider Zn as a simple charge donor for Y1Ba2Cu3O7-δ, but more complex change in the mechanism of transport seems to be introduced by the Cu substitution

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https://infoscience.epfl.ch/entities/publication/766e664d-f252-408c-b753-80ffd09cd2af

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Davor Pavuna
1989
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/766e664d-f252-408c-b753-80ffd09cd2af

About this result

Related concepts (32)

Data

In common usage and statistics, data (USˈdætə; UKˈdeɪtə) is a collection of discrete or continuous values that convey information, describing the quantity, quality, fact, statistics, other basic units of meaning, or simply sequences of symbols that may be further interpreted formally. A datum is an individual value in a collection of data. Data is usually organized into structures such as tables that provide additional context and meaning, and which may themselves be used as data in larger structures.

Coordination complex

A coordination complex is a chemical compound consisting of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents. Many metal-containing compounds, especially those that include transition metals (elements like titanium that belong to the periodic table's d-block), are coordination complexes. Coordination complexes are so pervasive that their structures and reactions are described in many ways, sometimes confusingly.

Yttrium barium copper oxide

Yttrium barium copper oxide (YBCO) is a family of crystalline chemical compounds that display high-temperature superconductivity; it includes the first material ever discovered to become superconducting above the boiling point of liquid nitrogen (77 K) at about . Many YBCO compounds have the general formula YBa2Cu3O7−x (also known as Y123), although materials with other Y:Ba:Cu ratios exist, such as YBa2Cu4Oy (Y124) or Y2Ba4Cu7Oy (Y247). At present, there is no singularly recognised theory for high-temperature superconductivity.

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Effects of Cu substitution by Zn on transport properties of Y1Ba2Cu3O7-δ

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