Heat release and time-dependent thermal expansion of NbTi(D)

被引：3
|
作者：
Escher, U [1 ]
Abens, S [1 ]
Gadun, A [1 ]
Köckert, C [1 ]
Sahling, S [1 ]
Schneider, M [1 ]
机构：
[1] Dresden Univ Technol, Inst Low Temp Phys, D-01062 Dresden, Germany
来源：
PHYSICA B | 2000年 / 284卷 / 284期
关键词：
heat release; NbTi(D); thermal expansion;
D O I：
10.1016/S0921-4526(99)02573-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
dGlasslike anomalies of low-temperature thermal properties were observed for polycrystalline NbTi doped with deuterium. The distribution parameter of two-level systems (TLS) determined from heat release data is about 40 times larger than that for vitreous silica. After rapid cooling together with a long-time heat release a time-dependent change of sample length was detected. The dependence of length relaxation on time as well as on starting temperature before cooling corresponds to the heat release data. The coefficient of the thermal expansion of the TLS is negative. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1159 / 1160
页数：2
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