The thermal/electronic transport properties of new superconductor MgB2 and MgCNi3
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Published:2003
Issue:12
Volume:52
Page:3150
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ISSN:1000-3290
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Container-title:Acta Physica Sinica
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language:
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Short-container-title:Acta Phys. Sin.
Author:
Wu Bai-Mei ,Li Bo ,Yang Dong-Sheng ,Zheng Wei-Hua ,Li Shi-Yan ,Cao Lie-Zhao ,Chen Xian-Hui ,
Abstract
The temperature dependence of thermal conductivity and electronic conductivity in superconductor MgB2, MgCNi3 and Bi2Sr2Ca0.9Ce0.1Cu2O8+y are presented. The thermal conductivity of Bi2Sr2Ca0.9Ce 0.1Cu2O8+y shows a peak under Tc observ ed in cuprates, but those of MgB 2 and MgCNi3 decrease monotonously. We calculate the elec tron thermal condu ctivity and the phonon thermal conductivity by Wiedemann-Franz law. The electron s contribute a large fraction to the thermal conductivity in normal state of MgB 2 and MgCNi3 because of the non-localigation of mutual eff ect of electrons. The analysis on electronic thermal conductivity indicates that the scattering by impurities prevails in electronic thermal resistance of both samples.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Cited by
2 articles.
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1. Thermal conductivity of materials and measuring system at cryogenic temperature;Proceedings of the Twentieth International Cryogenic Engineering Conference (ICEC20);2005
2. The physics of the non-oxide perovskite superconductor MgCNi3;Journal of Physics: Condensed Matter;2004-10-16