Original scientific paper

Anisotropic Transport Properties of the Orthorhombic Al₁₃Co₄ Approximant to the Decagonal Quasicrystal

Jagoda Lukatela ; Laboratory for the Physics of Transport Phenomena, Institute of Physics, Bijenička c. 46, P. O. Box 304, HR-10001 Zagreb, Croatia
Denis Stanić ; Laboratory for the Physics of Transport Phenomena, Institute of Physics, Bijenička c. 46, P. O. Box 304, HR-10001 Zagreb, Croatia
Petar Popčević ; Laboratory for the Physics of Transport Phenomena, Institute of Physics, Bijenička c. 46, P. O. Box 304, HR-10001 Zagreb, Croatia
Jovica Ivkov ; Laboratory for the Physics of Transport Phenomena, Institute of Physics, Bijenička c. 46, P. O. Box 304, HR-10001 Zagreb, Croatia
Janez Dolinšek ; Jožef Stefan Institute, University of Ljubljana, Jamova 39, SI-1000 Ljubljana, Slovenia
Peter Gille ; Ludwig-Maximilians-Universität München, Department of Earth and Environmental Sciences, Crystallography Section, Theresienstrasse 41, D-80333 München, Germany

Abstract

Anisotropic transport properties (electrical resistivity, thermoelectric power, Hall coefficient and thermal conductivity) of the o-Al₁₃Co₄ orthorhombic approximant to the decagonal phase were investigated. The crystalline-direction-dependent measurements were performed along the a, b and c directions of the orthorhombic unit cell, where (b, c) atomic planes are stacked along the perpendicular a direction. Anisotropic electrical and thermal conductivities are the highest along the stacking a direction. The anisotropic thermoelectric power changes sign with the crystalline direction and so does the anisotropic Hall coefficient, which changes from the negative electron-like to the positive hole-like for different combinations of the electric current and magnetic field direction. The transport properties of the o-Al₁₃Co₄ phase were compared to the literature data on approximant to the decagonal quasicrystals, the Al₇₆Co₂₂Ni₂ and the Al₈₀Cr₁₅Fe₅, allowing for the study of evolution of transport properties with increasing structural complexity and unit cell size.

Keywords

transport properties; approximant to the decagonal quasicrystal; orthorhombic Al₁₃Co₄

Hrčak ID:

52152

URI

https://hrcak.srce.hr/52152

Publication date:

30.4.2010.

Visits: 1.652 *