Naslov
Transport propreties of the T-Al3(Mn, Pd) quasicrystalline approximant

Autori
Stanić, Denis ; Batistić, Ivo ; Ivkov, Jovica ; Smontara, Ana, Dolinšek, J.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
10th International Conference on Quasicrystals, Program and Abstracts (10 ; 2008 ; Zurich) / Steurer, Walter - Zürich : ETH, 2008, 153-153

Skup
10th International Conference on Quasicrystals

Mjesto i datum
Zürich, Švicarska, 06.07.2008. - 11.07.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
quasicrystalline approximant ; T-Al3(Mn ; Pd/Fe) ; transport properties

Sažetak
We have investigated transport properties of the T-Al3(Mn, Pd) quasicrystalline approximant with composition Al73Mn27-x(Fe, Pd)x (x=0, 2, 4, 6). The structure is built of two atomic layers stacked along the b crystallographic axis, a flat layer and a puckered layer composed of two sublayers. The orthorhombic unit cell (space group Pnma) contains 156 atoms and many of the sites show either fractional occupation or mixed Mn/Al occupancy, so that there exists chemical disorder on the lattice. Majority of the atoms are clustered in the form of pentagonal prisms and antiprisms. In order to see how the structural complexity affects the physical properties we have performed measurements of the electrical resistivity, thermoelectric power and thermal conductivity. The temperature-dependent transport coefficients are consistently explained using spectral-conductivity model, which reveals that the Fermi energy is located at the minimum of the pseudogap in the spectral conductivity. The results are compared to the transport properties of -phases in the Al-Pd-transition-metal systems that are periodic crystals on the scale of several nm whereas their atomic-scale cluster substructure is quasicrystals-like.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

Napomena
This work was supported in part by the 6th Framework EU Network of Excellence 'Complex Metallic Alloys' (Contract No. NMP3-CT-2005-500140). The paper was presented as a poster by Denis Stanić.

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