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Anisotropic electrical, magnetic and thermal transport properties of the Al80Cr15Fe5 decagonal approximant

Philosophical Magazine 88(13-15): 2145-2153

Autoren/Herausgeber: Dolinsek J
Vrtnik S
Smontara A
Jagodic M
Jaglicic Z
Bauer B
Gille P
Erschienen: 2008

The anisotropic magnetic, electrical and thermal transport properties were studied of a single-crystalline Al80Cr15Fe5 approximant to the decagonal quasicrystal. The temperature-dependent electrical resistivity along the b and c crystalline directions shows non-metallic behaviour with a broad maximum, whereas it exhibits a metallic positive temperature coefficient along the a direction perpendicular to the (b, c) atomic planes. The resistivity can be treated with the model of slow charge carriers, where the increased electron-phonon scattering upon raising the temperature induces a transition from dominant Boltzmann (metallic) to dominant non-Boltzmann (insulating-like) regime. The magnetic susceptibility and thermal conductivity also reveal a small anisotropy.

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