Anisotropic magnetic, electrical, and thermal transport properties of the Y-Al-Ni-Co decagonal approximant

interactions was extracted, appearing in the same order as the resistivity, S a /TS c /TS b /T .A nisotropic thermal conductivity appears in the order bca , so that b is the most conducting direction for both electricity and heat. Hall coefficient RH exhibits pronounced anisotropy, where the magnetic field in a given crystalline direction yields the same RH for the current along the other two crystalline directions in the perpendicular plane. These anisotropies are analyzed in terms of the anisotropic structure of the Y-Al-Ni-Co phase and the ab initio calculated anisotropic Fermi surface. The results are compared with the literaturereported anisotropy of the physical properties of the d-Al-Ni-Co decagonal quasicrystal.