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首页> 外文期刊>Physica, C. Superconductivity and its applications >Analysis of fluctuation conductivity in melt-textured YBa2Cu3O7-y superconductors with Ag-doping
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Analysis of fluctuation conductivity in melt-textured YBa2Cu3O7-y superconductors with Ag-doping

机译：掺银的YBa2Cu3O7-y熔体超导体的波动电导率分析

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摘要

The difference in the properties between Ag-doped and undoped YBa2Cu2 O-, (YBCO) melt-textured samples was investigated by fluctuation-conductivity analysis. The temperature dependence of the resistance in those sample.,,, was measured. Data about the dimensionality and amplitude of the fluctuation were obtained by analyzing the fluctuation conductivity on the basis of the Aslamazov-Larkin theory. The fluctuation conductivity of the undoped sample shows three-dimensional behavior in the mean-field region (MFR) with a one-dimensional (ID) character at further higher temperature. The effect of a small amount of Ag addition is manifested On a fractal conduction behavior in the ID region of the undoped sample. Upon further Ag-doping. the conduction behavior is two-dimensional in the MFR with evidence for a rapid suppression of the short-wavelength fluctuation. The Conduction behavior is discussed on the relevance to structural features of melt-textured YBCO samples with and without Ag-doping. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 8]
机译：通过波动电导率分析研究了掺银和不掺YBa2Cu2 O-（YBCO）熔融织构样品之间的性能差异。测量了那些样品中电阻的温度依赖性。根据Aslamazov-Larkin理论，通过分析波动电导率，获得有关波动的维数和幅度的数据。未掺杂样品的波动电导率在更高的温度下在具有一维（ID）特性的平均场区域（MFR）中显示出三维行为。在未掺杂样品的ID区域中，少量Ag的添加对分形传导行为表现出影响。经过进一步的Ag掺杂。 MFR中的传导行为是二维的，有证据表明可以快速抑制短波波动。讨论了在有和没有Ag掺杂的情况下，熔融行为与YBCO样品的结构特征的相关性。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：8]

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