RESISTIVITY MINIMUM IN ANTI-FERROMAGNETIC CR-FE ALLOYS

被引:15
作者
KATANO, S
MORI, N
机构
[1] Department of Physics, Faculty of Science, Hokkaido University
关键词
D O I
10.1143/JPSJ.46.1265
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The electrical resistivity of Cr-Fe alloys containing up to 2.6 at. % Fe is measured in detail over the temperature range 0.5 K-340 K. The resistivity of the alloys containing less than 0.6 at. % Fe shows a constant value below about 1.8 K, decreases with increasing temperature in proportion to T2 and exhibits a minimum. The temperature of the minimum depends on c1/3, where c is the concentration of Fe. The resistivity of more concentrated alloys exhibits a minimum and a maximum. The magnetic susceptibility of the alloy containing 1.5 at. % Fe shows a sharp peak just below the temperature where the resistivity maximum takes place. These results suggest that the resistivity minimum in antiferromagnetic Cr-Fe alloys is due to the Kondo effect caused by localized magnetic moments on Fe atoms. The Kondo temperature TK of the alloy containing 0.6 at. % Fe is estimated at about 140 K. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.
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页码:1265 / 1272
页数:8
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