Publication

Thermoelectric power in Bi2Sr2Ca1-xPrxCu2O8+delta in a wide temperature range

László Forró
2006
Conference Papers

Abstract

Scientific conference paper We report thermopower and electrical resistance measurements of the high-temperature superconductor Bi2Sr2Ca1-xPrxCu2O8+delta (0 < x < 1) in a wide temperature range from 600 K to superconducting transition temperature (critical temperature, T-c). The transition temperature decreases with increasing x. Resistance obeys usual metallic linearity at higher temperatures, whereas at lower temperatures, before T-c (T similar to 300 K), a deviation from the linear trend is observed. Thermopower exhibits apparently non-metallic behavior - it increases with decreasing temperature and develops a broad maximum whose position and width increase with x. The results are discussed in the framework of several models present in the literature.

Official source

https://infoscience.epfl.ch/entities/publication/9e3314c2-2cc2-40a8-9af3-c33b61f51f9f

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László Forró
2006
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9e3314c2-2cc2-40a8-9af3-c33b61f51f9f

About this result

Related concepts (32)

Curie temperature

In physics and materials science, the Curie temperature (TC), or Curie point, is the temperature above which certain materials lose their permanent magnetic properties, which can (in most cases) be replaced by induced magnetism. The Curie temperature is named after Pierre Curie, who showed that magnetism was lost at a critical temperature. The force of magnetism is determined by the magnetic moment, a dipole moment within an atom which originates from the angular momentum and spin of electrons.

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.

Electrical resistance and conductance

The electrical resistance of an object is a measure of its opposition to the flow of electric current. Its reciprocal quantity is , measuring the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with mechanical friction. The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S) (formerly called the 'mho' and then represented by ℧). The resistance of an object depends in large part on the material it is made of.

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Thermoelectric power in Bi2Sr2Ca1-xPrxCu2O8+delta in a wide temperature range

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