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

Janez Dolinsek , Stanislav Vrtnik (1) , Ana Smontara (2) , Marko Jagodic (3) , Zvonko Jaglicic (3) , Birgitta Bauer (4) , Peter Gille (4)

1 IJS - Jozef Stefan Institute [Ljubljana]
2 Institute of Physics
3 IMFM
4 Uni-Muenchen

We present a study of the anisotropic electrical, magnetic and thermal transport properties of a single-crystalline Al80Cr15Fe5 approximant to the decagonal quasicrystal. Temperature-dependent electrical resistivity along the b and c crystalline directions shows nonmetallic behavior with a broad maximum, whereas it shows 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 transition from dominant Boltzmann (metallic) to dominant non-Boltzmann (insulatinglike) regime. Magnetic susceptibility and thermal conductivity show small anisotropy as well.

Mots clés: Physical Sciences

Janez Dolinsek, Stanislav Vrtnik, Ana Smontara, Marko Jagodic, Zvonko Jaglicic, et al.. Anisotropic electrical, magnetic and thermal transport properties of the Al80Cr15Fe5 decagonal approximant. Philosophical Magazine, 2008, 88 (13-15), pp.2145-2153. ⟨10.1080/14786430801946658⟩. ⟨hal-00513869⟩