Original scientific paper

Hall Coefficient of the Y-Al-Ni-Co Decagonal Approximant

Denis Stanić ; 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

We have investigated anisotropic Hall coefficient of Y-Al-Ni-Co decagonal approximant of the Al₇₆Co₂₂Ni₂ composition. The crystalline-direction-dependent studies were performed along three orthogonal directions a*, b and c of the Y-Al-Ni-Co unit cell, where (a,c) monoclinic atomic planes are stacked along the perpendicular b direction. Hall coefficient R_H exhibits pronounced anisotropy, while at the same time the magnetic field in a given crystalline direction yields the same R_H for the current along the other two crystalline directions in the perpendicular plane. The observed anisotropy is studied in terms of the anisotropic structure of the Y-Al-Ni-Co phase and Fermi surface. The results are compared to the anisotropy of the Hall coefficient of the d-Al-Ni-Co decagonal quasicrystal reported in literature.

Keywords

complex metallic alloys; decagonal approximants; Y-Al-Ni-Co; Hall effect

Hrčak ID:

51994

URI

https://hrcak.srce.hr/51994

Publication date:

30.4.2010.

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