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We present measurements of the anisotropic electrical and thermal transport coefficients (the electrical resistivity, the thermoelectric power, the thermal conductivity), the magnetization and the specific heat of the Al 13 Ru 4  monoclinic approximant to the decagonal quasicrystal, in comparison to the isostructural Al 13 Fe 4 . The electrical and thermal transport parameters of Al 13 Ru 4  were found to exhibit significant anisotropy, qualitatively similar to that found previously in the Al 13 Fe 4  (P. Popčević, et al.,  Phys. Rev. B  2010 ,  81 , 184203). The crystallographic  b  direction, corresponding to the stacking direction of the ( a , c ) atomic planes, is the most conducting direction for the electricity and heat. The thermopower is strongly anisotropic with a complicated temperature dependence, exhibiting maxima, minima, crossovers and sign change. The electronic density of states (DOS) at the Fermi energy is reduced to 35% of the DOS of Al metal. The magnetic susceptibility is diamagnetic and the diamagnetism is by a factor of 2 stronger for the magnetic field along the stacking  b  direction.

Anisotropic electrical, thermal and magnetic properties of Al 13 Ru 4 decagonal quasicrystalline approximant