Specific heat of the spin density wave state in Ce(Ru0.85Rh0.15)2Si2 under pressure

被引：4
|
作者：
Tang, J [1 ]
Matsumoto, T [1 ]
Abe, H [1 ]
Matsushita, A [1 ]
机构：
[1] Natl Res Inst Met, Ibaraki, Osaka 305, Japan
来源：
SOLID STATE COMMUNICATIONS | 1999年 / 109卷 / 07期
关键词：
heat conduction; heavy fermions; kondo effects; strain; high pressure;
D O I：
10.1016/S0038-1098(98)00602-4
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We have investigated the pressure effect on the magnetic state of the heavy-fermion compound Ce(Ru0.85Rh0.15)(2)Si-2 in which the spin density wave (SDW) is formed below 5.5 K at ambient pressure. The study was carried out by means of measurements of the specific heat up to 1.6 GPa between 0.7 and 10 K for a polycrystalline sample. In the low pressure region below 0.6 GPa, the Neel temperature T-N and the Sommerfeld coefficient gamma show a slight decrease from 5.5 to 4.9 K and from 310 to 290 mJ/K-2 mol, respectively. At higher pressure the peak in the specific heat becomes broad but T-N remains above 5 K, while gamma rapidly decreases. As a possible origin for the observed pressure dependence of T-N and gamma across 0.6 GPa, we propose the change in the SDW state at higher pressure. (C) 1999 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：445 / 448
页数：4
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