Letter to the Editor

Thermal conductivity of icosahedral i-Al72Pd19.5Mn8.5 quasicrystal

Ante Bilušić ; Institute of Physics, POB 304, HR-10001 Zagreb, Croatia
Željka Budrović ; Institute of Physics, POB 304, HR-10001 Zagreb, Croatia
Ana Smontara ; Institute of Physics, POB 304, HR-10001 Zagreb, Croatia

Abstract

Thermal, K(T) , and electrical conductivity, σ(T), measurements of the polygrain icosahedral quasicrystal i-Al72Pd19.5Mn8.5 are reported in the temperature range 10 K – 300 K. Electrical conductivity shows an anomalous behaviour with a minimum at 120 K and the room temperature value σRT = 83000 Ω−1m−1. Thermal conductivity at a room temperature is KRT ≈ 3.4 W/mK, and by lowering temperature, K(T) shows a broad minimum at 120 K, and a shallow maximum around 30 K. Temperature behaviour of thermal conductivity is explained by the Debye model in the temperature range below 50 K, and in the frame of the variable range hopping model above 120 K.

Keywords

polygrain icosahedral quasicrystal i-Al72Pd19.5Mn8.5; thermal conductivity; electrical conductivity; temperature 10 K - 300 K anomalous behaviour Debye model; hopping model

Hrčak ID:

301105

URI

https://hrcak.srce.hr/301105

Publication date:

1.8.2001.

Article data in other languages: croatian

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