Anomalous thermal behaviour of polyimide at very low temperatures

被引：1

作者：

Gottardi, E ^{[1
]}

Peroni, I

Peruzzi, A

Ponti, G

Ventura, G

机构：

[1] Univ Florence, Dept Phys, I-50127 Florence, Italy

[2] Univ Florence, Dept Energet, I-50139 Florence, Italy

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 1999年 / 78卷

关键词：

D O I：

10.1016/S0920-5632(99)00608-8

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The thermal conductivity of an aromatic polyimide sheet (Upilex R) in the 0.1 divided by 1K range was measured. A conductivity k = alpha.T-n, with alpha = (1.50 +/- 0.06).10(-5) W/cmK(n+1) and n = 1.00 +/- 0.03, which is substantially different from what predicted by the tunneling model, was found. The linear dependence on temperature, which reveals the presence of crystalline units inside the sample, has been explained within the framework of the structure scattering theory, together with the standard tunneling model, and the size of the crystallites has been estimated. Our results are compared with the thermal conductivity of other semicrystalline materials.

引用

页码：581 / 584

页数：4

共 15 条

[1] ANOMALOUS LOW-TEMPERATURE THERMAL PROPERTIES OF GLASSES AND SPIN GLASSES [J].