A comparative study of thermoelectric properties in (Pr,Y)Ba2Cu3O7 and PrBa2Cu3O7-Ag percolative systems

被引：1
|
作者：
Mori, Natsuki [1 ]
Okano, Hiroyuki [1 ]
Furuya, Akio [1 ]
机构：
[1] Oyama Natl Coll Technol, Dept Elect & Comp Engn, Oyama, Tochigi 3230806, Japan
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2006年 / 203卷 / 11期
关键词：
NORMAL-STATE PROPERTIES; BI2SR2CA1-XPRXCU2OY SYSTEM; POWER; SUPERCONDUCTIVITY; TRANSPORT; Y1-XPRXBA2CU3OY; RESISTIVITY; COMPOSITES; BEHAVIOR; PHASE;
D O I：
10.1002/pssa.200669591
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Measurements of the temperature-dependent thermoelectric power S(T) and resistivity p(7) were performed to characterize two kinds of polycrystalline systems (Pr1-xYx)Ba2CU3O7 and Ag-doped PrBa2Cu3O7, each of which exhibits percolative behaviour at a certain doping level. At room temperature, Jonker plots of the thermoelectric power against logarithm of the conductivity in both systems show a similar tendency that two different fitting lines are intercrossed at the percolation thresholds. The p(T) behaviour below 100 K in each system with low dopant content obeys the variable-range-hopping conduction. Variations of S(T) in both systems could be reconciled with the Boson-Fermion theory based on the resonating-valence-bond model with reasonable dependences of fitting parameters upon doping. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：2828 / 2831
页数：4
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