Anisotropic electrical, thermal and magnetic properties of Al13Ru4 decagonal quasicrystalline approximant

Abstract 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 Al13Ru4 monoclinic approximant to the decagonal quasicrystal, in comparison to the isostructural Al13Fe4. The electrical and thermal transport parameters of Al13Ru4 were found to exhibit significant anisotropy, qualitatively similar to that found previously in the Al13Fe4 (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.

[1]  P. Jeglič,et al.  Intrinsic anisotropic magnetic, electrical, and thermal transport properties of d-Al-Co-Ni decagonal quasicrystals , 2012 .

[2]  A. Smontara,et al.  Anisotropic Physical Properties of Complex Metallic Alloys , 2010 .

[3]  W. Steurer,et al.  o′-Al13Co4, a new quasicrystal approximant , 2010 .

[4]  H. Borrmann,et al.  Anisotropic physical properties of the Al13Fe4 complex intermetallic and its ternary derivative Al13(Fe,Ni)4 , 2010 .

[5]  P. Jeglič,et al.  Anisotropic magnetic and transport properties of orthorhombic Al13Co4 , 2009 .

[6]  P. Jeglič,et al.  Origin of the Hall-coefficient anisotropy in the Y–Al–Ni–Co periodic approximant to the decagonal phase , 2009 .

[7]  P. Gille,et al.  Single crystal growth of Al13Co4 and Al13Fe4 from Al‐rich solutions by the Czochralski method , 2008 .

[8]  P. Jeglič,et al.  Anisotropic magnetic, electrical, and thermal transport properties of the Y-Al-Ni-Co decagonal approximant , 2008 .

[9]  B. Grushko,et al.  A study of the Al-rich part of the Al–Ru alloy system , 2003 .

[10]  Uichiro Mizutani,et al.  Introduction to the Electron Theory of Metals: Superconductivity , 2001 .

[11]  J. Hafner,et al.  Highly anisotropic electronic structure in decagonal quasicrystals and approximants , 1998 .

[12]  V. Gramlich,et al.  Al13−x(Co1−yNiy)4, a new approximant of the decagonal quasicrystal in the Al-Co-Ni system , 1995 .

[13]  Fujiwara,et al.  Electronic structure and transport in a model approximant of the decagonal quasicrystal Al-Cu-Co. , 1994, Physical review. B, Condensed matter.

[14]  J. Grin,et al.  Crystal structure of orthorhombic Co4Al13 , 1994 .

[15]  Yun-ping,et al.  Universality in the resistivity-temperature relationship for decagonal quasicrystals. , 1994, Physical review. B, Condensed matter.

[16]  J. Grin,et al.  Refinement of the Fe4Al13 structure and its relationship to the quasihomological homeotypical structures , 1994 .

[17]  Thiel,et al.  Transport properties of Al65Cu15Co20 and Al70Ni15Co15 decagonal quasicrystals. , 1991, Physical review letters.

[18]  Burkov.  Structure model of the Al-Cu-Co decagonal quasicrystal. , 1991, Physical review letters.

[19]  S. Takeuchi,et al.  Anisotropic Conductivity in a Decagonal Quasicrystal of Al70Ni15Co15 , 1990 .

[20]  He,et al.  Anisotropic transport properties of a stable two-dimensional quasicrystal: Al62Si3Cu20Co15. , 1990, Physical review. B, Condensed matter.

[21]  C. Suryanarayana,et al.  Al13X4-type phases in aluminium-group VIII metal systems , 1983 .

[22]  B. Nyberg,et al.  The Crystal Structure of Ru4Al13. , 1965 .

[23]  S. Åsbrink,et al.  The Crystal Structure of Os4Al13. , 1964 .

[24]  R. Hudd,et al.  The structure of Co4Al13 , 1962 .