engleski

Anisotropic electrical, magnetic and thermal transport properties of the Al80Cr15Fe5 decagonal approximant

The anisotropic magnetic, electrical and thermal transport properties were studied of a single-crystalline Al80Cr15Fe5 approximant to the decagonal quasicrystal. The temperature-dependent electrical resistivity along the b and c crystalline directions shows non-metallic behaviour with a broad maximum, whereas it exhibits a metallic positive temperature coefficient along the a direction perpendicular to the (b, c) atomic planes. The resistivity can be treated with the model of slow charge carriers, where the increased electron-phonon scattering upon raising the temperature induces a transition from dominant Boltzmann (metallic) to dominant non-Boltzmann (insulating-like) regime. The magnetic susceptibility and thermal conductivity also reveal a small anisotropy.

thermal conductivity; electrical resistivity; Al18Cr15Fe5

S.I.: Quasicrystals : the silver jubilee ; J. Dolinšek je rad porezentirao kao pozvano predavanje na skupu Quasicrystals, The Silver Jubilee, održanom od 14.-19.102007., Tel Aviv, Israel. Objavljen je u S.I.: Quasicrystals: the silver jubilee, a dio je rada Dolinšek, J. ; Jeglič, P. ; Komelj, M. ; Vrtnik, S. ; Smontara, Ana ; Smiljanić, Igor ; Bilušić, Ante ; Ivkov, Jovica ; Stanić, Denis Zijlstra, E. S. ; Bauer, B. ; Gille, P., "Origin of anisotropic nonmetallic transport in Al80Cr15Fe5 decagonal approximant" objavljenog u Physical Review B 76 (2007) 174207-174220. This work was supported in a part by the 6th Framework EU Network of Excellence 'Complex Metallic Alloys' (Contract No. NMP3-CT-2005-500140)