VALENCE-FLUCTUATION BEHAVIOR OF YB IONS IN YBCUGA

被引：29

作者：

ADROJA, DT ^{[1
]}

MALIK, SK ^{[1
]}

PADALIA, BD ^{[1
]}

BHATIA, SN ^{[1
]}

WALIA, R ^{[1
]}

机构：

[1] TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.42.2700

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The compound YbCuGa has been synthesized and is found to crystallize in the orthorhombic CeCu2-type structure. Its magnetic susceptibility has been measured between 4.2 and 300 K and shows a broad maximum at about 190 K. This maximum is a characteristic feature of the mixed-valent Ce- and Yb-based compounds. The temperature-dependent resistivity exhibits an S-type behavior. The thermoelectric power is negative between 20 and 300 K and also shows a broad minimum at about 190 K. L3 x-ray-absorption near-edge-structure (XANES) measurements show the two-peak pattern that corresponds to two different valence states of Yb. Thus, magnetic susceptibility, electrical resistivity, thermoelectric power, and L XANES measurements all point to the mixed-valence nature of Yb ions in YbCuGa. © 1990 The American Physical Society.

引用

页码：2700 / 2703

页数：4

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