High-pressure resistivity and thermoelectric power in Yb14MnSb11

被引：13
|
作者：
Akrap, A. [1 ]
Barisic, N.
Forro, L.
Mandrus, D.
Sales, B. C.
机构：
[1] Ecole Polytech Fed Lausanne, Inst Phys Mat Complexe, CH-1015 Lausanne, Switzerland
[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
来源：
PHYSICAL REVIEW B | 2007年 / 76卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.76.085203
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the electrical transport properties of Yb14MnSb11, resistivity and thermoelectric power under pressures up to 2.3 GPa. In both transport coefficients we can follow the ferromagnetic transition, which shows a shift from the ambient pressure value of 52 K to lower temperatures and eventually saturation at 49 K for p>2.0 GPa. The high values of thermopower and its linear temperature dependence down to 100 K demonstrate that the system is a bad metal. Anomalies in the thermopower below the ferromagnetic transition are rather sensitive to pressure. Our experimental observations are consistent with the model of an underscreened Kondo lattice.
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页数：4
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