Temperature- and pressure-induced valence transition in EuCo2Ge2

被引：17
|
作者：
Dionicio, G
Wilhelm, H
Hossain, Z
Geibel, C
机构：
[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
[2] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India
来源：
PHYSICA B-CONDENSED MATTER | 2006年 / 378-80卷
关键词：
EuCO2Ge2; resistivity; valence transition; high pressure;
D O I：
10.1016/j.physb.2006.01.258
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The temperature dependence of the electrical resistivity p(T) of EuCo2Ge2 was measured up to 7GPa in the temperature range 4K < T < 300 K. At ambient pressure, the magnetic Eu2+ moments order antiferromagnetically below T-N = 23 K. Upon applying pressure, TN increases monotonously. For pressures higher than 3GPa, the change of the overall shape of p(T) suggests a temperature and pressure-induced continuous valence transition from a high-temperature Eu2+ state to a low-temperature Eu3+ state. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：724 / 725
页数：2
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