Publication

Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3

László Forró, Arnaud Magrez, Andrzej Sienkiewicz, Richard Gaal, Rita Smajda, Jacim Jacimovic, Zlatko Mickovic, George Cristian Vaju
2011
Journal Articles

Résumé

Cubic ZnMnO3 powder in the form of well-crystalline nanoflakes have been synthesized at low temperatures from a nitrate precursor. The electrical properties of cubic ZuMnO(3) samples have been established by DC resistivity (rho) and thermo-electric power (Seebeck coefficient) measurements on a pressed pellet. The material exhibits insulator behavior with 0.7 eV acceptor ionization energy in the measured temperature range of 170-300 K. The thermo-electric power indicates a positive sign of the charge carriers. The obtained material exhibits a superparamagnetic signature with a blocking temperature of 9 K and the ZFC-FC splitting temperature of 15 K. (C) 2010 Elsevier Ltd. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/72b2e763-adbd-4d09-adc9-8fcbc8911710

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László Forró, Arnaud Magrez, Andrzej Sienkiewicz, Richard Gaal, Rita Smajda, Jacim Jacimovic, Zlatko Mickovic, George Cristian Vaju
2011
Journal Articles

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/72b2e763-adbd-4d09-adc9-8fcbc8911710

À propos de ce résultat

Concepts associés (32)

Electrical resistivity and conductivity

Electrical resistivity (also called volume resistivity or specific electrical resistance) is a fundamental specific property of a material that measures its electrical resistance or how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm-metre (Ω⋅m).

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.

Circuit électrique

vignette|Circuit électrique à Calcutta, Inde. Un circuit électrique au sens matériel est un ensemble simple ou complexe de composants électriques ou électroniques, y compris des simples conducteurs, parcourus par un courant électrique. Au sens de la théorie des circuits, un circuit électrique est une abstraction des configurations matérielles, un agencement d'éléments définis par des relations mathématiques, reliés par des conducteurs idéaux. L'étude électrocinétique d'un circuit électrique consiste à déterminer, à chaque endroit, l'intensité du courant et la tension.

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