THERMAL-CONDUCTIVITY OF CENISN SINGLE-CRYSTALS

被引：19

作者：

ISIKAWA, Y ^{[1
]}

MORI, K ^{[1
]}

OGISO, Y ^{[1
]}

OYABE, K ^{[1
]}

SATO, K ^{[1
]}

机构：

[1] TOYAMA UNIV,DEPT PHYS,TOYAMA 930,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1991年 / 60卷 / 08期

关键词：

CENISN; TERNARY COMPOUND; THERMAL CONDUCTIVITY; ELECTRICAL RESISTIVITY; SPECIFIC HEAT; HEAVY FERMION; VALENCE FLUCTUATION;

D O I：

10.1143/JPSJ.60.2514

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The thermal conductivity of CeNiSn single crystals has been measured in the temperature range between 1.6 K and 18 K along each of the principal axes. The thermal conductivity is very anisotropic, reflecting the orthorhombic crystal structure. A broad peak and an obscure indent are observed at 5.6 K and 6.9 K, respectively, in the temperature dependence of the thermal conductivity along the b-axis. This anomalous behavior is considered to be associated with the energy-gap formation in the semiconductorlike heavy-fermion compound around these temperatures. Below 2.6 K, all of the thermal conductivity along the a-, b- and c-axes obeys a T1.5-dependence. Carriers of the thermal conduction are mainly phonons and are scattered dominantly by electrons, which is speculated from the comparison with the electrical resistivity and specific heat data.

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页码：2514 / 2517

页数：4

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