Phonon scattering in quasicrystalline i-Al72Pd19.5Mn8.5:: A study of the low-temperature thermal conductivity

被引：17

作者：

Bilusic, A.

Smontara, A.

Dolinsek, J.

McGuiness, P.

Ott, H. R.

机构：

[1] Univ Split, Fac Nat Sci, HR-21000 Split, Croatia

[2] Inst Phys, HR-10001 Zagreb, Croatia

[3] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia

[4] ETH Honggerberg, Festkorperphys Lab, CH-8093 Zurich, Switzerland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 432卷 / 1-2期

关键词：

quasicrystals; heat conduction; transmission electron microscopy;

D O I：

10.1016/j.jallcom.2006.05.097

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We measured the thermal conductivity of an icosahedral quasicrystal i-Al72Pd19.5Mn8.5 in the temperature range between 0.4 K and 300 K. The analysis of the low-temperature results was based on a Debye-type model. The results of the analysis for the two temperature regions of 0.4K < T < 40K and 0.4K < T < 1 K, are not consistent in the sense that a tunnelling-states contribution to phonon scattering is verified only for OAK < T < 1 K. The same fitting procedure indicates that structural defects of the stacking-fault type are an important source of phonon scattering. Their physical presence was clearly identified by a transmission electron microscopy experiment. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6