OBSERVATION OF HEAVY-FERMION LIKE BEHAVIOR AND ANOMALOUS MAGNETISM IN A PR-BASED METAL

被引:23
作者
SAMPATHKUMARAN, EV [1 ]
DAS, I [1 ]
VIJAYARAGHAVAN, R [1 ]
HIROTA, K [1 ]
ISHIKAWA, M [1 ]
机构
[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN
关键词
D O I
10.1016/0038-1098(91)90217-J
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The results of magnetic susceptibility, electrical resistivity and heat capacity measurements on the pseudoternary solid solutions, Pr(1-x)GdxCu2Si2, are reported. There is an unusual enhancement of Neel temperature (T(N)) of Pr sub-lattice in PrCu2Si2 (T(N) = 21K) over that of GdCu2Si2 (T(N) = 13K). Present results indicate that this anomalous magnetism gets relatively depressed by positive chemical pressure effects induced by Gd or Y substitution. Interestingly, the linear coefficient of heat capacity above T(N) is found to be large for PrCu2Si2 (approximately 225 mJ/mol K2) and this parameter undergoes a drastic reduction with Gd substitution. Such a strong dependence of this linear term on the positive chemical pressure indicates possible heavy fermion behaviour of Pr in a metallic environment.
引用
收藏
页码:971 / 977
页数:7
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