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Zeitschrift für Kristallographie - Crystalline Materials

Editor-in-Chief: Pöttgen, Rainer

Ed. by Antipov, Evgeny / Boldyreva, Elena V. / Friese, Karen / Huppertz, Hubert / Jahn, Sandro / Tiekink, E. R. T.

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SCImago Journal Rank (SJR) 2018: 0.892
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Volume 224, Issue 1-2


Phonon-enhanced thermoelectric power of Y–Al–Ni–Co decagonal approximant

Janez Dolinsek / Ana Smontara / Osor S. Barisic / Peter Gille
Published Online: 2009-09-25 | DOI: https://doi.org/10.1524/zkri.2009.1033


We have investigated anisotropic electrical resistivity and thermoelectric power of the ypsilon-phase Al–Ni–Co (Y–Al–Ni–Co) decagonal approximant with composition Al76Co22Ni2. The crystalline-direction-dependent measurements 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. Anisotropic electrical resistivity is low in all crystalline directions, appearing in the order ρa* > ρc > ρb and showing positive temperature coefficient typical of electron-phonon scattering mechanism. Thermopower shows electron-phonon enhancement effect. Anisotropic bare thermopower (in the absence of electron-phonon interactions) was extracted, appearing in the same order as the resistivity, ΙSa*bare/TΙ > Ι Scbare/T Ι > Ι Sbbare/T Ι.

Keywords: Thermoelectric power; Quasicrystals; Decagonal approximants; Y-Al-Ni-Co phase

About the article

* Correspondence address: Ljubljana, Slowenien,

Published Online: 2009-09-25

Published in Print: 2009-01-01

Citation Information: Zeitschrift für Kristallographie - Crystalline Materials, Volume 224, Issue 1-2, Pages 64–66, ISSN (Online) 2196-7105, ISSN (Print) 2194-4946, DOI: https://doi.org/10.1524/zkri.2009.1033.

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