Naslov
Anisotropic Transport Properties of the Al13TM4 and T-Al-Mn-Fe Complex Metallic Alloys

Autori
Smontara, Ana ; Popčević, Petar ; Stanić, Denis ; Velebit, Kristijan ; Dolinšek, J.

Izvornik
Philosophical magazine (1478-6435) 91 (2011), 19/21 (S.I.); 2746-2755

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
complex metallic alloys; electrical resistivity; thermal transport; anisotropy; thermopower; approximants

Sažetak
Anisotropic transport properties (electrical resistivity, ρ(T), thermoelectric power, S(T), and thermal conductivity k(T)) of the Al76Co22Ni2 (Y-phase Al-Ni-Co), o-Al13Co4 and T-Al72.5Mn21.5Fe6 complex metallic alloys has been investigated in wide temperature range 2-300 K. The investigated compounds belong to the class of decagonal approximant phases with stacked-layer crystallographic structure and enabled us to study the evolution of transport properties with increasing structural complexity and the unit cell size. For the Y-Al-Ni-Co and o-Al13Co4, the anisotropic electronic transport coefficients can be reproduced theoretically by an ab-initio calculation using Boltzmann transport theory and the calculated anisotropic Fermi surface. Non-metallic anisotropic electrical resistivity of T-Al72.5Mn21.5Fe6 can be analyzed in a semi-quantitative way by using the theory of quantum transport of slow charge carriers.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
Rad je pod naslovom "Anisotropic transport properties of Complex Metallic Alloys" Ana Smontara prezentirala kao pozvano predavanje na skupu 11th International conference on quasicrystals (ICQ11), održanom od 13.-18.06.2010.g., Sapporo, Japan ; S.I.: Proceedings of the Eleventh International Conference on Quasicrystals, 13-18 June 2010, Sapporo, Japan.

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