Specific heat measurements of PdHx over wide temperature range

被引：3
|
作者：
Araki, H [1 ]
Harada, S
Fukuda, M
Syvokon, V
Kubota, M
机构：
[1] Niigata Univ, Fac Engn, Harada Lab, Grad Sch Sci & Technol, Niigata 9502181, Japan
[2] Univ Tokyo, Inst Solid State Phys, Tokyo 1068666, Japan
来源：
PHYSICA B | 2000年 / 284卷
关键词：
hydrogen; palladium; specific heat;
D O I：
10.1016/S0921-4526(99)02516-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Quantum effects of atomic hydrogen may be expected in palladium hydride at some low temperature. The present paper describes specific-heat measurements of PdHx (x = 0.13, 0.33, 0.71) over a wide temperature range from 0.3 to 200 K in magnetic fields up to 1 T. From the low-temperature part of the results the specific-heat coefficients gamma for electrons and beta for lattice have been evaluated and found to be consistent with earlier reports. However, the specific-heat anomaly, found around 55 K in earlier measurements, could not be detected. Below 2 K the specific heat was observed to depend on magnetic field, which indicates a nuclear contribution. Based on the electronic and nuclear specific heats, the electronic state of the matrix and of the hydrogen will be discussed. The origin of the 55 K anomaly will also be discussed. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1255 / 1256
页数：2
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